diff --git a/Cargo.lock b/Cargo.lock
index c7874a2..3eb9f25 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -350,6 +350,22 @@ version = "1.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8c3c1a368f70d6cf7302d78f8f7093da241fb8e8807c05cc9e51a125895a6d5b"
 
+[[package]]
+name = "bike"
+version = "0.1.0"
+dependencies = [
+ "az",
+ "cortex-m",
+ "cortex-m-rt",
+ "embedded-alloc",
+ "embedded-hal 0.2.7",
+ "fixed",
+ "fugit",
+ "lights-core",
+ "panic-halt 0.2.0",
+ "rp-pico 0.8.0",
+]
+
 [[package]]
 name = "bindgen"
 version = "0.69.5"
@@ -392,6 +408,18 @@ version = "0.10.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dc827186963e592360843fb5ba4b973e145841266c1357f7180c43526f2e5b61"
 
+[[package]]
+name = "bitfield"
+version = "0.13.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "46afbd2983a5d5a7bd740ccb198caf5b82f45c40c09c0eed36052d91cb92e719"
+
+[[package]]
+name = "bitfield"
+version = "0.14.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2d7e60934ceec538daadb9d8432424ed043a904d8e0243f3c6446bce549a46ac"
+
 [[package]]
 name = "bitflags"
 version = "1.3.2"
@@ -731,6 +759,38 @@ version = "0.8.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "773648b94d0e5d620f64f280777445740e61fe701025087ec8b57f45c791888b"
 
+[[package]]
+name = "cortex-m"
+version = "0.7.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ec610d8f49840a5b376c69663b6369e71f4b34484b9b2eb29fb918d92516cb9"
+dependencies = [
+ "bare-metal",
+ "bitfield 0.13.2",
+ "embedded-hal 0.2.7",
+ "volatile-register",
+]
+
+[[package]]
+name = "cortex-m-rt"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee84e813d593101b1723e13ec38b6ab6abbdbaaa4546553f5395ed274079ddb1"
+dependencies = [
+ "cortex-m-rt-macros",
+]
+
+[[package]]
+name = "cortex-m-rt-macros"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f0f6f3e36f203cfedbc78b357fb28730aa2c6dc1ab060ee5c2405e843988d3c7"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
+]
+
 [[package]]
 name = "cpufeatures"
 version = "0.2.14"
@@ -973,6 +1033,66 @@ dependencies = [
  "serde 1.0.210",
 ]
 
+[[package]]
+name = "embedded-alloc"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ddae17915accbac2cfbc64ea0ae6e3b330e6ea124ba108dada63646fd3c6f815"
+dependencies = [
+ "critical-section",
+ "linked_list_allocator",
+]
+
+[[package]]
+name = "embedded-dma"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "994f7e5b5cb23521c22304927195f236813053eb9c065dd2226a32ba64695446"
+dependencies = [
+ "stable_deref_trait",
+]
+
+[[package]]
+name = "embedded-hal"
+version = "0.2.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "35949884794ad573cf46071e41c9b60efb0cb311e3ca01f7af807af1debc66ff"
+dependencies = [
+ "nb 0.1.3",
+ "void",
+]
+
+[[package]]
+name = "embedded-hal"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "361a90feb7004eca4019fb28352a9465666b24f840f5c3cddf0ff13920590b89"
+
+[[package]]
+name = "embedded-hal-async"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0c4c685bbef7fe13c3c6dd4da26841ed3980ef33e841cddfa15ce8a8fb3f1884"
+dependencies = [
+ "embedded-hal 1.0.0",
+]
+
+[[package]]
+name = "embedded-hal-nb"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fba4268c14288c828995299e59b12babdbe170f6c6d73731af1b4648142e8605"
+dependencies = [
+ "embedded-hal 1.0.0",
+ "nb 1.1.0",
+]
+
+[[package]]
+name = "embedded-io"
+version = "0.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "edd0f118536f44f5ccd48bcb8b111bdc3de888b58c74639dfb034a357d0f206d"
+
 [[package]]
 name = "emseries"
 version = "0.6.0"
@@ -1825,6 +1945,26 @@ dependencies = [
  "crunchy",
 ]
 
+[[package]]
+name = "halloween-leds"
+version = "0.1.0"
+dependencies = [
+ "cortex-m-rt",
+ "embedded-hal 1.0.0",
+ "embedded-io",
+ "panic-halt 1.0.0",
+ "rp-pico 0.9.0",
+]
+
+[[package]]
+name = "hash32"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "47d60b12902ba28e2730cd37e95b8c9223af2808df9e902d4df49588d1470606"
+dependencies = [
+ "byteorder",
+]
+
 [[package]]
 name = "hashbrown"
 version = "0.14.5"
@@ -1874,6 +2014,16 @@ dependencies = [
  "http 0.2.12",
 ]
 
+[[package]]
+name = "heapless"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0bfb9eb618601c89945a70e254898da93b13be0388091d42117462b265bb3fad"
+dependencies = [
+ "hash32",
+ "stable_deref_trait",
+]
+
 [[package]]
 name = "heck"
 version = "0.4.1"
@@ -2885,6 +3035,18 @@ dependencies = [
  "system-deps",
 ]
 
+[[package]]
+name = "panic-halt"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "de96540e0ebde571dc55c73d60ef407c653844e6f9a1e2fdbd40c07b9252d812"
+
+[[package]]
+name = "panic-halt"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a513e167849a384b7f9b746e517604398518590a9142f4846a32e3c2a4de7b11"
+
 [[package]]
 name = "parking"
 version = "2.2.1"
@@ -3587,6 +3749,130 @@ dependencies = [
  "thiserror",
 ]
 
+[[package]]
+name = "rp-pico"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6341771e6f8e5d130b2b3cbc23435b7847761adf198af09f4b2a60407d43bd56"
+dependencies = [
+ "cortex-m-rt",
+ "fugit",
+ "rp2040-boot2",
+ "rp2040-hal 0.9.2",
+ "usb-device 0.2.9",
+]
+
+[[package]]
+name = "rp-pico"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b9342d3ac7011ac688300979e9b52a81f0add1d05feb02868cf94bfee0705b28"
+dependencies = [
+ "cortex-m-rt",
+ "fugit",
+ "rp2040-boot2",
+ "rp2040-hal 0.10.2",
+ "usb-device 0.3.2",
+]
+
+[[package]]
+name = "rp2040-boot2"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7c92f344f63f950ee36cf4080050e4dce850839b9175da38f9d2ffb69b4dbb21"
+dependencies = [
+ "crc-any",
+]
+
+[[package]]
+name = "rp2040-hal"
+version = "0.9.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1ff2b9ae7e6dd6720fd9f64250c9087260e50fe98b6b032ccca65be3581167ca"
+dependencies = [
+ "cortex-m",
+ "critical-section",
+ "embedded-dma",
+ "embedded-hal 0.2.7",
+ "frunk",
+ "fugit",
+ "itertools 0.10.5",
+ "nb 1.1.0",
+ "paste",
+ "pio",
+ "rand_core 0.6.4",
+ "rp2040-hal-macros",
+ "rp2040-pac 0.5.0",
+ "usb-device 0.2.9",
+ "vcell",
+ "void",
+]
+
+[[package]]
+name = "rp2040-hal"
+version = "0.10.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d11e711940087f2cdff8aeae9f4b902e2014c06a00b39a1092686b81ec973d6f"
+dependencies = [
+ "bitfield 0.14.0",
+ "cortex-m",
+ "critical-section",
+ "embedded-dma",
+ "embedded-hal 0.2.7",
+ "embedded-hal 1.0.0",
+ "embedded-hal-async",
+ "embedded-hal-nb",
+ "embedded-io",
+ "frunk",
+ "fugit",
+ "itertools 0.10.5",
+ "nb 1.1.0",
+ "paste",
+ "pio",
+ "rand_core 0.6.4",
+ "rp2040-hal-macros",
+ "rp2040-pac 0.6.0",
+ "usb-device 0.3.2",
+ "vcell",
+ "void",
+]
+
+[[package]]
+name = "rp2040-hal-macros"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "86479063e497efe1ae81995ef9071f54fd1c7427e04d6c5b84cde545ff672a5e"
+dependencies = [
+ "cortex-m-rt",
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
+]
+
+[[package]]
+name = "rp2040-pac"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "12d9d8375815f543f54835d01160d4e47f9e2cae75f17ff8f1ec19ce1da96e4c"
+dependencies = [
+ "cortex-m",
+ "cortex-m-rt",
+ "critical-section",
+ "vcell",
+]
+
+[[package]]
+name = "rp2040-pac"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "83cbcd3f7a0ca7bbe61dc4eb7e202842bee4e27b769a7bf3a4a72fa399d6e404"
+dependencies = [
+ "cortex-m",
+ "cortex-m-rt",
+ "critical-section",
+ "vcell",
+]
+
 [[package]]
 name = "rsa"
 version = "0.9.6"
@@ -4781,6 +5067,22 @@ version = "2.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "daf8dba3b7eb870caf1ddeed7bc9d2a049f3cfdfae7cb521b087cc33ae4c49da"
 
+[[package]]
+name = "usb-device"
+version = "0.2.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1f6cc3adc849b5292b4075fc0d5fdcf2f24866e88e336dd27a8943090a520508"
+
+[[package]]
+name = "usb-device"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "98816b1accafbb09085168b90f27e93d790b4bfa19d883466b5e53315b5f06a6"
+dependencies = [
+ "heapless",
+ "portable-atomic",
+]
+
 [[package]]
 name = "utf-8"
 version = "0.7.6"
diff --git a/Cargo.toml b/Cargo.toml
index db1cddf..de2074b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -32,5 +32,5 @@ members = [
     "sgf",
     "timezone-testing",
     "tree",
-    "visions/server", "gm-dash/server",
+    "visions/server", "gm-dash/server", "halloween-leds"
 ]
diff --git a/halloween-leds/.cargo/config.toml b/halloween-leds/.cargo/config.toml
new file mode 100644
index 0000000..fead60a
--- /dev/null
+++ b/halloween-leds/.cargo/config.toml
@@ -0,0 +1,12 @@
+[build]
+target = "thumbv6m-none-eabi"
+
+[target.thumbv6m-none-eabi]
+rustflags = [
+    "-C", "link-arg=--nmagic",
+    "-C", "link-arg=-Tlink.x",
+    "-C", "llvm-args=--inline-threshold=5",
+    "-C", "no-vectorize-loops",
+]
+
+runner = "elf2uf2-rs -d"
diff --git a/halloween-leds/Cargo.toml b/halloween-leds/Cargo.toml
new file mode 100644
index 0000000..676ac35
--- /dev/null
+++ b/halloween-leds/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "halloween-leds"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+cortex-m-rt = "0.7.3"
+embedded-hal = "1.0.0"
+embedded-io = "0.6.1"
+panic-halt = "1.0.0"
+rp-pico = "0.9.0"
diff --git a/halloween-leds/src/main.rs b/halloween-leds/src/main.rs
new file mode 100644
index 0000000..5dea472
--- /dev/null
+++ b/halloween-leds/src/main.rs
@@ -0,0 +1,103 @@
+#![no_main]
+#![no_std]
+
+use embedded_hal::{delay::DelayNs, digital::OutputPin};
+use embedded_hal::spi::SpiBus;
+use panic_halt as _;
+use rp_pico::hal::gpio::bank0::Gpio0;
+use rp_pico::{
+    entry,
+    hal::{
+        clocks::init_clocks_and_plls,
+        fugit::RateExtU32,
+        gpio::{
+            bank0::{Gpio2, Gpio4},
+            FunctionSio, Pin, PullDown, SioOutput,
+        },
+        spi::{Enabled, Spi, SpiDevice, ValidSpiPinout},
+        uart::{DataBits, StopBits, UartConfig, UartPeripheral},
+        Clock, Sio, Timer, Watchdog,
+    },
+    pac, Pins,
+};
+
+const XOSC_CRYSTAL_FREQ: u32 = 12_000_000; // MHz, https://forums.raspberrypi.com/viewtopic.php?t=356764
+
+#[entry]
+unsafe fn main() -> ! {
+    let mut peripherals = pac::Peripherals::take().unwrap();
+    let sio = Sio::new(peripherals.SIO);
+    let mut watchdog = Watchdog::new(peripherals.WATCHDOG);
+    let pins = Pins::new(
+        peripherals.IO_BANK0,
+        peripherals.PADS_BANK0,
+        sio.gpio_bank0,
+        &mut peripherals.RESETS,
+    );
+    let clocks = init_clocks_and_plls(
+        XOSC_CRYSTAL_FREQ,
+        peripherals.XOSC,
+        peripherals.CLOCKS,
+        peripherals.PLL_SYS,
+        peripherals.PLL_USB,
+        &mut peripherals.RESETS,
+        &mut watchdog,
+    )
+    .ok()
+    .unwrap();
+
+    // let mut power_light: Pin<Gpio0, FunctionSio<SioOutput>, PullDown> = pins.gpio0.into_function();
+    // power_light.set_high();
+    let mut timer = Timer::new(peripherals.TIMER, &mut peripherals.RESETS, &clocks);
+
+    let spi_clk = pins.gpio10.into_function();
+    let spi_sdo = pins.gpio11.into_function();
+    let spi = Spi::<_, _, _, 8>::new(peripherals.SPI1, (spi_sdo, spi_clk));
+    let mut spi = spi.init(
+        &mut peripherals.RESETS,
+        clocks.peripheral_clock.freq(),
+        1_u32.MHz(),
+        embedded_hal::spi::MODE_1,
+    );
+
+    let mut lights: [u8; 126] = [0; 126];
+    lights[124] = 0xff;
+    lights[125] = 0xff;
+    for i in 0..30 {
+        lights[(i + 1) * 4 + 0] = 0xe0 + 1;
+        lights[(i + 1) * 4 + 1] = 255;
+    }
+
+    let mut brightness = 1;
+    let mut step = 1;
+    loop {
+        if brightness == 255 && step == 1 {
+            step = -1;
+        } else if brightness == 1 && step == -1 {
+            step = 1;
+        };
+        for i in 0..30 {
+            lights[(i + 1) * 4 + 3] = brightness as u8;
+        }
+        brightness = brightness + step;
+        
+        spi.write(lights.as_slice());
+        timer.delay_ms(10);
+    }
+
+    /*
+    let pins = (pins.gpio0.into_function(), pins.gpio1.into_function());
+
+    let uart = UartPeripheral::new(peripherals.UART0, pins, &mut peripherals.RESETS)
+        .enable(
+            UartConfig::new(9600_u32.Hz(), DataBits::Eight, None, StopBits::One),
+            clocks.peripheral_clock.freq(),
+        )
+        .unwrap();
+
+    loop {
+        uart.write_full_blocking(b"Hello World!\r\n");
+        timer.delay_ms(1000);
+    }
+    */
+}