const size = range(128)
const d = 1
const rects = flatten(size.map(x => size.map(y => [x, y, d, d])))

let counter = 0;

draw = () => {
  counter++
  rects.forEach(rect => {
    rectFill(...rect, rect[0] + (rect[1] * counter) / 100)
  })
}