Update index.md

Author: filipczekajlo

color/p5js/colm/index.md

@@ -3,7 +3,7 @@ layout: p5js
 author: Filip Czekajlo
 author-url: https://github.com/filipczekajlo
 title: colm
-tags: [P5.js, color]
+tags: [P5.js, color, Law of Good Gestalt]
 permalink: /color/colm
 summary: Stripes changing color gradient after every row. Colors range form orange to blue.
 ---