diff --git a/README.md b/README.md
index 0b42805..cfd2b05 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,14 @@ http://lolengine.net/blog/2013/07/27/rgb-to-hsv-in-glsl
 ### usage
 
 ```
-#pragma glslify: convertHsvToRgb = require(glsl-convert-color/convertHsvToRgb);
-#pragma glslify: convertRgbToHsv = require(glsl-convert-color/convertRgbToHsv);
+#pragma glslify: convertHsvToRgb = require(glsl-util/convertHsvToRgb);
+#pragma glslify: convertRgbToHsv = require(glsl-util/convertRgbToHsv);
+```
+
+## random
+
+### usage
+
+```
+#pragma glslify: random = require(glsl-util/random);
 ```
diff --git a/random.glsl b/random.glsl
new file mode 100644
index 0000000..039e284
--- /dev/null
+++ b/random.glsl
@@ -0,0 +1,4 @@
+float random(vec2 co){
+  return fract(sin(dot(co.xy ,vec2(12.9898,78.233))) * 43758.5453);
+}
+#pragma glslify: export(random)