diff --git a/phasic-rainbow.glsl b/phasic-rainbow.glsl
new file mode 100644
index 0000000..cb0d5a6
--- /dev/null
+++ b/phasic-rainbow.glsl
@@ -0,0 +1,25 @@
+// amiga internal vendetta or coppermaster style plasma;
+// gigatron base source from here; 
+#ifdef GL_ES
+precision mediump float;
+#extension GL_OES_standard_derivatives : enable
+#endif
+
+uniform float time;
+uniform vec2 resolution;
+#define r resolution
+#define t time
+void main( void ) {
+	vec2 p=gl_FragCoord.xy/r;
+	 
+	
+	p= floor(p*32.)/32.;
+	vec3 a=vec3(0.5, 0.5, 0.5);
+	vec3 b=vec3(0.5, 0.5, 0.5);
+	vec3 c=vec3(t/4., t*0.4, t/2.);
+	vec3 d=vec3(0.0, 0.33, 0.67);
+	vec3 col = b+a*sin(8.0*(c+p.y+sin(p.x+p.x+t) ));
+	     //col*= b+a*sin(10.0*(c+p.y+cos(p.y+p.y+t) ));
+	 
+	gl_FragColor=vec4(col, 1.0);
+}