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

assets/shaders/mouse_move_boxes.frag

@@ -0,0 +1,47 @@
+uniform vec2 u_resolution;
+uniform vec2 u_mouse;
+uniform float u_time;
+
+#define PI 3.14159265358979323846
+
+vec2 rotate2D(vec2 st, float angle, float view_at=0.5, float origin=0.5) {
+  st -= view_at;
+  st = mat2(cos(angle), -sin(angle),
+      sin(angle), cos(angle)) * st;
+  st += origin;
+  return st;
+}
+
+float box(vec2 st, vec2 size, float smoothEdges) {
+  size = vec2(0.5) - size * 0.5;
+  vec2 aa = vec2(smoothEdges * 0.5);
+  vec2 uv = smoothstep(size, size + aa, st);
+  uv *= smoothstep(size, size+aa, vec2(1.0) - st);
+  return uv.x * uv.y;
+}
+
+vec2 tile(vec2 st, float zoom) {
+  st *= zoom;
+  return fract(st);
+}
+
+float circle(vec2 st, float radius) {
+  vec2 l = st - vec2(0.5);
+  return 1.0 - smoothstep(radius - (radius * 0.01),
+      radius+(radius * 0.01),
+      dot(l,l) * 4.0);
+}
+
+void main() {
+  vec2 st = gl_FragCoord.xy/u_resolution;
+  vec3 color = vec3(0.0);
+  vec2 mouse_at = smoothstep(0.1, 0.9, u_mouse/u_resolution);
+
+  st = tile(st, 4.0);
+
+  st = rotate2D(st, PI * sin(u_time) / 4, 0.5, mouse_at);
+
+  color = vec3(box(st, vec2(0.7), 0.01));
+
+  gl_FragColor = vec4(color, 1.0);
+}