gistfile1.txt

function createRandomGIF(width, height, colors) {
   return {
      width: width,
      height: height,
      resolution: 7,
      colorTable: {
         sorted: false,
         colors: random(colors, 0x000000, 0xFFFFFF)
      },
      background: 0,
      aspect: 0,
      loopCount: 0,
      graphics: [{
         type: 'image',
         left: 0,
         top: 0,
         width: width,
         height: height,
         interlaced: false,
         data: random(width*height, 0, colors - 1)
      }],
      comments: []
   };
}