Bring over my bag of shit shaders and use one as a placeholder for the build status indicator.

assets/shaders/daythree.frag

@@ -0,0 +1,35 @@
+uniform vec2 u_resolution;
+uniform vec2 u_mouse;
+uniform float u_time;
+
+float random(in vec2 st) {
+  return fract(sin(dot(st.xy,
+          vec2(12.9898,78.233)))
+      * 43758.5453123);
+}
+
+float noise(in vec2 st) {
+  vec2 i = floor(st);
+  vec2 f = fract(st);
+
+  float a = random(i);
+  float b = random(i + vec2(1.0, 0.0));
+  float c = random(i + vec2(0.0, 1.0));
+  float d = random(i + vec2(1.0, 1.0));
+
+  vec2 u = f * f * (3.0 - 2.0 * f);
+
+  return mix(a, b, u.x) +
+    (c - a) * u.y * (1.0 - u.x) +
+    (d - b) * u.x * u.y;
+}
+
+void main() {
+  vec2 st = gl_FragCoord.xy/u_resolution.xy;
+
+  vec2 pos = vec2(st * 5.0);
+
+  float n = noise(pos);
+
+  gl_FragColor = vec4(vec3(n), 1.0);
+}