Revise Halloween pattern

hello_gradient/src/bin/halloween2019.rs

@@ -12,23 +12,37 @@ use lights::{
 };
 use lights_hal::{boot, delay, entry};
 
+const ORANGE: Rgb = Rgb(255,150,0);
+const PURPLE: Rgb = Rgb(200,0,255);
+
+const BUFFER_LEN: usize = 300;
+
 #[entry]
 fn main() -> ! {
     let mut lights = boot();
     lights.heartbeat();
 
+    let front_pattern = [
+        PURPLE,
+        PURPLE,
+        ORANGE,
+        PURPLE,
+        PURPLE,
+    ].iter().cycle();
+    let back_pattern = repeat(&ORANGE);
+
     let pattern =
-        repeat(&Rgb(255,0,255)).take(150)
+        back_pattern.take(150)
         .chain(
-            repeat(&Rgb(255,128,0)).take(150)
+            front_pattern.take(150)
         ).cycle();
 
-    let mut buffer = [HardwareRgb(255,255,0); 200];
+    let mut buffer = [HardwareRgb(255,255,0); BUFFER_LEN];
     loop {
         // blink light to demonstrate loop is still running
         lights.heartbeat();
 
-        for (i, pixel) in pattern.clone().take(200).enumerate() {
+        for (i, pixel) in pattern.clone().take(BUFFER_LEN).enumerate() {
             buffer[i] = correct(pixel);
         }
 

hello_gradient/src/bin/mardi_gras.rs

@@ -13,7 +13,7 @@ const GREEN: Rgb = Rgb(100, 255, 0);
 const PURPLE: Rgb = Rgb(196, 0, 255);
 
 const SEGMENT_LEN: usize = 50;
-const BUFFER_LEN: usize = 200;
+const BUFFER_LEN: usize = 300;
 
 #[entry]
 fn main() -> ! {