​

function setup() {

  createCanvas(400, 400)

  colorMode(HSB, 1, 1, 1)

  pink = color(0.9, 0.2, 1)

  lightBlue = color(0.5, 0.2, 1)

  purple = color(0.75, 0.3, 1)

  yellow = color(0.15, 0.2, 1)

  //noLoop()

  frameRate(60)

  noStroke()

  direction = 1

}

​

function draw() {

  for (let x1 = 0; x1 < width; x1 += 2) {

    let x2 = x1 + 2

    let pinkle = lerpColor(pink, purple, x1 / width)

    // print(pinkle)

    fill(pinkle)

    rect(x1, 0, x2, height)

  }

  pinkHue = hue(pink)

​

  if (pinkHue >= 0.98)

    direction = -1

  else if (pinkHue <= 0.02)

    direction = 1

  pinkHue = pinkHue + 0.01 * direction

  pink = color(pinkHue, saturation(pink), brightness(pink))

}