CanvasStars

Author: pdw
Category: Christmas Challenge
Language: Canvas
Len source code: 12
Instructions:
  Try it online: https://dzaima.github.io/Canvas/?u=KiV1RkYxNCVENyV1RkYwRiV1RkYxMyV1RkYzQiV1MjUzQyV1RkY1RCV1MjA3NiV1RkYzQiV1RkY0QSV1MjdGMw__,v=8
Description:
  First three "palindromize" operations turn a diagonal line into a
  four-by-four grid of diamonds. Then twelve "delete first line and
  rotate" combos shave off the extra diamonds.