From 60bb43e87b86bddd0792d1e7d6be373640a109f0 Mon Sep 17 00:00:00 2001
From: Daniel Thompson <daniel@redfelineninja.org.uk>
Date: Mon, 18 May 2020 22:19:19 +0100
Subject: [PATCH] apps: gameoflife: Better pixel colour selection

---
 wasp/apps/gameoflife.py | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/wasp/apps/gameoflife.py b/wasp/apps/gameoflife.py
index 80c5528..f1f1dbe 100644
--- a/wasp/apps/gameoflife.py
+++ b/wasp/apps/gameoflife.py
@@ -36,11 +36,11 @@ def xorshift12(v: int) -> int:
 
 @micropython.viper
 def get_color(v: int) -> int:
-    r = v >> 10
-    g = (v >> 8) & 7
-    b = (v >> 5) & 3
-
-    return (r << 13) | (g << 7) | (b << 1) | 0x9c73
+    """Convert a 12-bit number into a reasonably bright RGB565 pixel"""
+    rgb = v ^ (v << 4)
+    while 0 == (rgb & 0xc710):
+        rgb += 0x2104
+    return rgb
 
 @micropython.viper
 def get_cell(board, stride: int, x: int, y: int) -> bool: