a rotating cube (#3)

public/shaders/triangle/frag.glsl

@@ -0,0 +1,13 @@
+#version 300 es
+
+// fragment shaders don't have a default precision so we need
+// to pick one. highp is a good default. It means "high precision"
+precision highp float;
+
+// we need to declare an output for the fragment shader
+out vec4 outColor;
+
+void main() {
+  // Just set the output to a constant redish-purple
+  outColor = vec4(1, 0, 0.5, 1);
+}