basic: added color panes and moving lights; utilities: added shapes; weird: added piet (doesnt scale)

basic/color_panes.glsl

@@ -0,0 +1,12 @@
+#ifdef GL_ES
+precision mediump float;
+#endif
+
+uniform vec2 u_resolution;
+uniform vec2 u_mouse;
+
+void main(){
+    vec2 st = gl_FragCoord.xy/u_resolution.xy;
+
+    gl_FragColor = vec4(floor(vec3(st, u_mouse.x/u_resolution.x)+0.5),1.0);
+}