Square dance-off

let c
let r = Array(50).fill().map((_, i) => i < 25)
function setup() {
  c = createCanvas(windowWidth, windowHeight);
  background(220)
  r = shuffle(r)
}
function windowResized() {
  resizeCanvas(windowWidth, windowHeight)
  background(220)
}

let x = 0
let y = 0
let tx = 150
let ty = 150
let n = 0

function draw() {
  colorMode(RGB)
  background(220, 10)
  for (let i = 0; i < 2; i ++) {
    push()
    translate(width/2, height/2)
    rotate(PI + (n * 0.005))
    scale(1.02)
    image(c, -width/2, -height/2)
    pop()
    colorMode(HSL)
    fill(((frameCount * 10 + random(13)) * (i - 0.5)%360 + 360)%360, 100, 60)
    rect(x, y, 40, 40)
  }
  x += (tx - x) * 0.3
  y += (ty - y) * 0.3
  if (frameCount % r.length == 0) {
    tx = random(width/2.5) + random(width/2.5)
    ty = random(height/2.5) + random(height/2.5)
  }
  if (r[frameCount % r.length]) {
    n ++
  } else if (n > 0) {
    n --
  }
}