diff --git a/pico-st7789/src/canvas.rs b/pico-st7789/src/canvas.rs
index cb2d05b..b154ebf 100644
--- a/pico-st7789/src/canvas.rs
+++ b/pico-st7789/src/canvas.rs
@@ -8,11 +8,6 @@
 // e       c
 //   d d d
 
-use alloc::collections::btree_map::BTreeMap;
-
-/*
-*/
-
 pub struct RGB { pub r: u8, pub g: u8, pub b: u8 }
 
 pub trait Canvas {
@@ -34,92 +29,3 @@ pub trait Canvas {
     }
 }
 
-/*
-pub const DIGIT_WIDTH: usize = 5;
-pub const DIGIT_HEIGHT: usize = 9;
-
-pub const ZERO_SEVEN_SEGMENT: [bool; 7] = [true, true, true, true, true, true, false];
-
-pub const ONE_SEVEN_SEGMENT: [bool; 7] = [false, true, true, false, false, false, false];
-
-pub const TWO_SEVEN_SEGMENT: [bool; 7] = [true, true, false, true, true, false, true];
-
-pub const THREE_SEVEN_SEGMENT: [bool; 7] = [true, true, true, true, false, false, true];
-
-pub const FOUR_SEVEN_SEGMENT: [bool; 7] = [false, true, true, false, false, true, true];
-
-pub const FIVE_SEVEN_SEGMENT: [bool; 7] = [true, false, true, true, false, true, true];
-
-pub const SIX_SEVEN_SEGMENT: [bool; 7] = [true, false, true, true, true, true, true];
-
-pub const SEVEN_SEVEN_SEGMENT: [bool; 7] = [true, true, true, false, false, false, false];
-
-pub const EIGHT_SEVEN_SEGMENT: [bool; 7] = [true, true, true, true, true, true, true];
-
-pub const NINE_SEVEN_SEGMENT: [bool; 7] = [true, true, true, false, false, true, true];
-
-pub const SEVEN_SEGMENT_FONT: [[bool; 7]; 10] = [
-    ZERO_SEVEN_SEGMENT,
-    ONE_SEVEN_SEGMENT,
-    TWO_SEVEN_SEGMENT,
-    THREE_SEVEN_SEGMENT,
-    FOUR_SEVEN_SEGMENT,
-    FIVE_SEVEN_SEGMENT,
-    SIX_SEVEN_SEGMENT,
-    SEVEN_SEVEN_SEGMENT,
-    EIGHT_SEVEN_SEGMENT,
-    NINE_SEVEN_SEGMENT,
-];
-
-pub fn write_pixel(framebuf: &mut [u8], width: usize, x: usize, y: usize, color: (u8, u8, u8)) {
-    framebuf[(y * width + x) * 3 + 0] = color.0 << 2;
-    framebuf[(y * width + x) * 3 + 1] = color.1 << 2;
-    framebuf[(y * width + x) * 3 + 2] = color.2 << 2;
-}
-
-pub fn draw_seven_segment(
-    digit: u8,
-    frame: &mut [u8],
-    width: usize,
-    x: usize,
-    y: usize,
-    color: (u8, u8, u8),
-) {
-    let segments = SEVEN_SEGMENT_FONT[digit as usize];
-    if segments[0] {
-        write_pixel(frame, width, x + 1, y, color);
-        write_pixel(frame, width, x + 2, y, color);
-        write_pixel(frame, width, x + 3, y, color);
-    }
-    if segments[1] {
-        write_pixel(frame, width, x + 4, y + 1, color);
-        write_pixel(frame, width, x + 4, y + 2, color);
-        write_pixel(frame, width, x + 4, y + 3, color);
-    }
-    if segments[2] {
-        write_pixel(frame, width, x + 4, y + 5, color);
-        write_pixel(frame, width, x + 4, y + 6, color);
-        write_pixel(frame, width, x + 4, y + 7, color);
-    }
-    if segments[3] {
-        write_pixel(frame, width, x + 1, y + 8, color);
-        write_pixel(frame, width, x + 2, y + 8, color);
-        write_pixel(frame, width, x + 3, y + 8, color);
-    }
-    if segments[4] {
-        write_pixel(frame, width, x, y + 5, color);
-        write_pixel(frame, width, x, y + 6, color);
-        write_pixel(frame, width, x, y + 7, color);
-    }
-    if segments[5] {
-        write_pixel(frame, width, x, y + 1, color);
-        write_pixel(frame, width, x, y + 2, color);
-        write_pixel(frame, width, x, y + 3, color);
-    }
-    if segments[6] {
-        write_pixel(frame, width, x + 1, y + 4, color);
-        write_pixel(frame, width, x + 2, y + 4, color);
-        write_pixel(frame, width, x + 3, y + 4, color);
-    }
-}
-*/
diff --git a/pico-st7789/src/font/mod.rs b/pico-st7789/src/font/mod.rs
index 126176d..3886765 100644
--- a/pico-st7789/src/font/mod.rs
+++ b/pico-st7789/src/font/mod.rs
@@ -1,5 +1,8 @@
 use crate::canvas::{Canvas, RGB};
 
+mod seven_segment;
+pub use seven_segment::SevenSegmentFont;
+
 mod sixteen_segment;
 pub use sixteen_segment::SixteenSegmentFont;
 
@@ -9,5 +12,6 @@ pub trait Font<A> {
 
 pub trait Glyph {
     fn draw(&self, canvas: &mut impl Canvas, x: usize, y: usize, color: &RGB);
+    fn extents(&self) -> (usize, usize);
 }
 
diff --git a/pico-st7789/src/font/seven_segment.rs b/pico-st7789/src/font/seven_segment.rs
new file mode 100644
index 0000000..94dd8cd
--- /dev/null
+++ b/pico-st7789/src/font/seven_segment.rs
@@ -0,0 +1,211 @@
+use alloc::collections::btree_map::BTreeMap;
+use bitflags::bitflags;
+
+use crate::canvas::{Canvas, RGB};
+
+use super::{Font, Glyph};
+
+// Seven Segments
+//
+//   a a a
+// f       b
+// f       b
+// f       b
+//   g g g
+// e       c
+// e       c
+// e       c
+//   d d d
+
+bitflags! {
+    pub struct SevenSegmentGlyph: u8 {
+        const NONE = 0;
+        const A = 0x01;
+        const B = 0x01 << 1;
+        const C = 0x01 << 2;
+        const D = 0x01 << 3;
+        const E = 0x01 << 4;
+        const F = 0x01 << 5;
+        const G = 0x01 << 6;
+        const DOT = 0x01 << 7;
+    }
+}
+
+pub struct SevenSegmentFont(BTreeMap<char, SevenSegmentGlyph>);
+
+impl SevenSegmentFont {
+    pub fn new() -> Self {
+        let mut font = BTreeMap::new();
+        font.insert(' ', SevenSegmentGlyph::NONE);
+        font.insert(
+            '0',
+            SevenSegmentGlyph::A
+                | SevenSegmentGlyph::B
+                | SevenSegmentGlyph::C
+                | SevenSegmentGlyph::D
+                | SevenSegmentGlyph::E
+                | SevenSegmentGlyph::F,
+        );
+        font.insert('1', SevenSegmentGlyph::B | SevenSegmentGlyph::C);
+        font.insert(
+            '2',
+            SevenSegmentGlyph::A
+                | SevenSegmentGlyph::B
+                | SevenSegmentGlyph::D
+                | SevenSegmentGlyph::E
+                | SevenSegmentGlyph::G,
+        );
+        font.insert(
+            '3',
+            SevenSegmentGlyph::A
+                | SevenSegmentGlyph::B
+                | SevenSegmentGlyph::C
+                | SevenSegmentGlyph::G
+                | SevenSegmentGlyph::D,
+        );
+        font.insert(
+            '4',
+            SevenSegmentGlyph::B
+                | SevenSegmentGlyph::C
+                | SevenSegmentGlyph::F
+                | SevenSegmentGlyph::G,
+        );
+        font.insert(
+            '5',
+            SevenSegmentGlyph::A
+                | SevenSegmentGlyph::C
+                | SevenSegmentGlyph::D
+                | SevenSegmentGlyph::F
+                | SevenSegmentGlyph::G,
+        );
+        font.insert(
+            '6',
+            SevenSegmentGlyph::A
+                | SevenSegmentGlyph::E
+                | SevenSegmentGlyph::F
+                | SevenSegmentGlyph::G
+                | SevenSegmentGlyph::C
+                | SevenSegmentGlyph::D,
+        );
+        font.insert(
+            '7',
+            SevenSegmentGlyph::A | SevenSegmentGlyph::B | SevenSegmentGlyph::C,
+        );
+        font.insert(
+            '8',
+            SevenSegmentGlyph::A
+                | SevenSegmentGlyph::B
+                | SevenSegmentGlyph::C
+                | SevenSegmentGlyph::D
+                | SevenSegmentGlyph::E
+                | SevenSegmentGlyph::F
+                | SevenSegmentGlyph::G,
+        );
+        font.insert(
+            '9',
+            SevenSegmentGlyph::A
+                | SevenSegmentGlyph::B
+                | SevenSegmentGlyph::C
+                | SevenSegmentGlyph::F
+                | SevenSegmentGlyph::G,
+        );
+        font.insert(
+            'A',
+            SevenSegmentGlyph::A
+                | SevenSegmentGlyph::B
+                | SevenSegmentGlyph::C
+                | SevenSegmentGlyph::E
+                | SevenSegmentGlyph::F
+                | SevenSegmentGlyph::G,
+        );
+        font.insert(
+            'B',
+            SevenSegmentGlyph::C
+                | SevenSegmentGlyph::D
+                | SevenSegmentGlyph::E
+                | SevenSegmentGlyph::F
+                | SevenSegmentGlyph::G,
+        );
+        font.insert(
+            'C',
+            SevenSegmentGlyph::A
+                | SevenSegmentGlyph::D
+                | SevenSegmentGlyph::E
+                | SevenSegmentGlyph::F,
+        );
+        font.insert(
+            'D',
+            SevenSegmentGlyph::B
+                | SevenSegmentGlyph::C
+                | SevenSegmentGlyph::D
+                | SevenSegmentGlyph::E
+                | SevenSegmentGlyph::G,
+        );
+        font.insert(
+            'E',
+            SevenSegmentGlyph::A
+                | SevenSegmentGlyph::D
+                | SevenSegmentGlyph::E
+                | SevenSegmentGlyph::F
+                | SevenSegmentGlyph::G,
+        );
+        font.insert(
+            'F',
+            SevenSegmentGlyph::A
+                | SevenSegmentGlyph::E
+                | SevenSegmentGlyph::F
+                | SevenSegmentGlyph::G,
+        );
+        Self(font)
+    }
+}
+
+impl Font<SevenSegmentGlyph> for SevenSegmentFont {
+    fn glyph(&self, c: char) -> &SevenSegmentGlyph {
+        self.0.get(&c).unwrap()
+    }
+}
+
+impl Glyph for SevenSegmentGlyph {
+    fn draw(&self, canvas: &mut impl Canvas, x: usize, y: usize, color: &RGB) {
+        if self.contains(SevenSegmentGlyph::A) {
+            canvas.set_pixel(x + 1, y, color);
+            canvas.set_pixel(x + 2, y, color);
+            canvas.set_pixel(x + 3, y, color);
+        }
+        if self.contains(SevenSegmentGlyph::B) {
+            canvas.set_pixel(x + 4, y + 1, color);
+            canvas.set_pixel(x + 4, y + 2, color);
+            canvas.set_pixel(x + 4, y + 3, color);
+        }
+        if self.contains(SevenSegmentGlyph::C) {
+            canvas.set_pixel(x + 4, y + 5, color);
+            canvas.set_pixel(x + 4, y + 6, color);
+            canvas.set_pixel(x + 4, y + 7, color);
+        }
+        if self.contains(SevenSegmentGlyph::D) {
+            canvas.set_pixel(x + 1, y + 8, color);
+            canvas.set_pixel(x + 2, y + 8, color);
+            canvas.set_pixel(x + 3, y + 8, color);
+        }
+        if self.contains(SevenSegmentGlyph::E) {
+            canvas.set_pixel(x, y + 5, color);
+            canvas.set_pixel(x, y + 6, color);
+            canvas.set_pixel(x, y + 7, color);
+        }
+        if self.contains(SevenSegmentGlyph::F) {
+            canvas.set_pixel(x, y + 1, color);
+            canvas.set_pixel(x, y + 2, color);
+            canvas.set_pixel(x, y + 3, color);
+        }
+        if self.contains(SevenSegmentGlyph::G) {
+            canvas.set_pixel(x + 1, y + 4, color);
+            canvas.set_pixel(x + 2, y + 4, color);
+            canvas.set_pixel(x + 3, y + 4, color);
+        }
+    }
+
+    fn extents(&self) -> (usize, usize) {
+        (5, 8)
+    }
+}
diff --git a/pico-st7789/src/font/sixteen_segment.rs b/pico-st7789/src/font/sixteen_segment.rs
index fe021ff..62e1285 100644
--- a/pico-st7789/src/font/sixteen_segment.rs
+++ b/pico-st7789/src/font/sixteen_segment.rs
@@ -513,5 +513,9 @@ impl Glyph for SixteenSegmentGlyph {
             canvas.set_pixel(x + 7, y + 11, color);
         }
     }
+
+    fn extents(&self) -> (usize, usize) {
+        (8, 12)
+    }
 }
 
diff --git a/pico-st7789/src/main.rs b/pico-st7789/src/main.rs
index e404ba7..68b0554 100644
--- a/pico-st7789/src/main.rs
+++ b/pico-st7789/src/main.rs
@@ -17,7 +17,7 @@ mod canvas;
 use canvas::{Canvas, RGB};
 
 mod font;
-use font::{Font, Glyph, SixteenSegmentFont};
+use font::{Font, Glyph, SevenSegmentFont, SixteenSegmentFont};
 
 mod st7789;
 use st7789::{ST7789Display, SETUP_PROGRAM};
@@ -64,6 +64,7 @@ unsafe fn main() -> ! {
         unsafe { HEAP.init(HEAP_MEM.as_ptr() as usize, HEAP_SIZE) }
     }
 
+    let font_seven = SevenSegmentFont::new();
     let font_sixteen = SixteenSegmentFont::new();
 
     // rp_pico::pac::Peripherals is a reference to physical hardware defined on the Pico.
@@ -163,119 +164,172 @@ unsafe fn main() -> ! {
         draw_seven_segment(9, &mut frame, 63, 0, (255, 255, 255));
         */
 
-        font_sixteen
+        font_seven
             .glyph(' ')
             .draw(&mut canvas, 0, 0, &white);
-        font_sixteen
+        font_seven
             .glyph('0')
             .draw(&mut canvas, 11, 0, &white);
-        font_sixteen
+        font_seven
             .glyph('1')
             .draw(&mut canvas, 22, 0, &white);
-        font_sixteen
+        font_seven
             .glyph('2')
             .draw(&mut canvas, 33, 0, &white);
-        font_sixteen
+        font_seven
             .glyph('3')
             .draw(&mut canvas, 44, 0, &white);
-        font_sixteen
+        font_seven
             .glyph('4')
             .draw(&mut canvas, 55, 0, &white);
-        font_sixteen
+        font_seven
             .glyph('5')
             .draw(&mut canvas, 66, 0, &white);
-        font_sixteen
+        font_seven
             .glyph('6')
             .draw(&mut canvas, 77, 0, &white);
-        font_sixteen
+        font_seven
             .glyph('7')
             .draw(&mut canvas, 88, 0, &white);
-        font_sixteen
+        font_seven
             .glyph('8')
             .draw(&mut canvas, 99, 0, &white);
-        font_sixteen
+        font_seven
             .glyph('9')
             .draw(&mut canvas, 110, 0, &white);
 
-        font_sixteen
+        font_seven
             .glyph('A')
+            .draw(&mut canvas, 121, 0, &white);
+        font_seven
+            .glyph('B')
+            .draw(&mut canvas, 132, 0, &white);
+        font_seven
+            .glyph('C')
+            .draw(&mut canvas, 143, 0, &white);
+        font_seven
+            .glyph('D')
+            .draw(&mut canvas, 154, 0, &white);
+        font_seven
+            .glyph('E')
+            .draw(&mut canvas, 165, 0, &white);
+        font_seven
+            .glyph('F')
+            .draw(&mut canvas, 0, 20, &white);
+
+        font_sixteen
+            .glyph(' ')
             .draw(&mut canvas, 0, 20, &white);
         font_sixteen
-            .glyph('B')
+            .glyph('0')
             .draw(&mut canvas, 11, 20, &white);
         font_sixteen
-            .glyph('C')
+            .glyph('1')
             .draw(&mut canvas, 22, 20, &white);
         font_sixteen
-            .glyph('D')
+            .glyph('2')
             .draw(&mut canvas, 33, 20, &white);
         font_sixteen
-            .glyph('E')
+            .glyph('3')
             .draw(&mut canvas, 44, 20, &white);
         font_sixteen
-            .glyph('F')
+            .glyph('4')
             .draw(&mut canvas, 55, 20, &white);
         font_sixteen
-            .glyph('G')
+            .glyph('5')
             .draw(&mut canvas, 66, 20, &white);
         font_sixteen
-            .glyph('H')
+            .glyph('6')
             .draw(&mut canvas, 77, 20, &white);
         font_sixteen
-            .glyph('I')
+            .glyph('7')
             .draw(&mut canvas, 88, 20, &white);
         font_sixteen
-            .glyph('J')
+            .glyph('8')
             .draw(&mut canvas, 99, 20, &white);
         font_sixteen
-            .glyph('K')
+            .glyph('9')
             .draw(&mut canvas, 110, 20, &white);
+
+        font_sixteen
+            .glyph('A')
+            .draw(&mut canvas, 0, 40, &white);
+        font_sixteen
+            .glyph('B')
+            .draw(&mut canvas, 11, 40, &white);
+        font_sixteen
+            .glyph('C')
+            .draw(&mut canvas, 22, 40, &white);
+        font_sixteen
+            .glyph('D')
+            .draw(&mut canvas, 33, 40, &white);
+        font_sixteen
+            .glyph('E')
+            .draw(&mut canvas, 44, 40, &white);
+        font_sixteen
+            .glyph('F')
+            .draw(&mut canvas, 55, 40, &white);
+        font_sixteen
+            .glyph('G')
+            .draw(&mut canvas, 66, 40, &white);
+        font_sixteen
+            .glyph('H')
+            .draw(&mut canvas, 77, 40, &white);
+        font_sixteen
+            .glyph('I')
+            .draw(&mut canvas, 88, 40, &white);
+        font_sixteen
+            .glyph('J')
+            .draw(&mut canvas, 99, 40, &white);
+        font_sixteen
+            .glyph('K')
+            .draw(&mut canvas, 110, 40, &white);
         font_sixteen
             .glyph('L')
-            .draw(&mut canvas, 121, 20, &white);
+            .draw(&mut canvas, 121, 40, &white);
         font_sixteen
             .glyph('M')
-            .draw(&mut canvas, 132, 20, &white);
+            .draw(&mut canvas, 132, 40, &white);
         font_sixteen
             .glyph('N')
-            .draw(&mut canvas, 143, 20, &white);
+            .draw(&mut canvas, 143, 40, &white);
         font_sixteen
             .glyph('O')
-            .draw(&mut canvas, 154, 20, &white);
+            .draw(&mut canvas, 154, 40, &white);
 
         font_sixteen
             .glyph('P')
-            .draw(&mut canvas, 0, 40, &white);
+            .draw(&mut canvas, 0, 60, &white);
         font_sixteen
             .glyph('Q')
-            .draw(&mut canvas, 11, 40, &white);
+            .draw(&mut canvas, 11, 60, &white);
         font_sixteen
             .glyph('R')
-            .draw(&mut canvas, 22, 40, &white);
+            .draw(&mut canvas, 22, 60, &white);
         font_sixteen
             .glyph('S')
-            .draw(&mut canvas, 33, 40, &white);
+            .draw(&mut canvas, 33, 60, &white);
         font_sixteen
             .glyph('T')
-            .draw(&mut canvas, 44, 40, &white);
+            .draw(&mut canvas, 44, 60, &white);
         font_sixteen
             .glyph('U')
-            .draw(&mut canvas, 55, 40, &white);
+            .draw(&mut canvas, 55, 60, &white);
         font_sixteen
             .glyph('V')
-            .draw(&mut canvas, 66, 40, &white);
+            .draw(&mut canvas, 66, 60, &white);
         font_sixteen
             .glyph('W')
-            .draw(&mut canvas, 77, 40, &white);
+            .draw(&mut canvas, 77, 60, &white);
         font_sixteen
             .glyph('X')
-            .draw(&mut canvas, 88, 40, &white);
+            .draw(&mut canvas, 88, 60, &white);
         font_sixteen
             .glyph('Y')
-            .draw(&mut canvas, 99, 40, &white);
+            .draw(&mut canvas, 99, 60, &white);
         font_sixteen
             .glyph('Z')
-            .draw(&mut canvas, 110, 40, &white);
+            .draw(&mut canvas, 110, 60, &white);
 
         canvas.square(10, 70, 160, 310, &white);