diff --git a/assets/shader_programs/test_fragment.glsl b/assets/shader_programs/test_fragment.glsl
index 01df77d..9b8adee 100644
--- a/assets/shader_programs/test_fragment.glsl
+++ b/assets/shader_programs/test_fragment.glsl
@@ -7,9 +7,17 @@ precision mediump float;
 uniform vec2 u_resolution;
 uniform float u_time;
 
-void main() {
-	vec2 st = gl_FragCoord.xy/u_resolution;
-	gl_FragColor = vec4(st.x,st.y,0.0,1.0);
+vec3 colorA = vec3(0.149,0.141,0.912);
+vec3 colorB = vec3(1.000,0.833,0.224);
 
-	gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);
+void main() {
+    vec3 color = vec3(0.0);
+
+    float pct = abs(sin(u_time));
+
+    // Mix uses pct (a value from 0-1) to
+    // mix the two colors
+    color = mix(colorA, colorB, pct);
+
+    gl_FragColor = vec4(color,1.0);
 }
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