let y = 25;

function setup() {

  createCanvas(windowWidth, windowHeight);

}

​

function draw() {

  background(255);

  let widinc = 20;

  let heiinc = -20;

  let wed = 100;

  let hei = 200;

  while (x <= windowWidth) {

    let r = 0;

    let g = random(255);

    let b = random(255);

    fill(r, g, b);

    triangle(x, y, 50, 50, wed, hei);

    wed += widinc;

    hei += heiinc;

    if (wed > 200 || wed < 100) {

      widinc *= -1;

    }

    if (hei < 100 || hei > 200) {

      heiinc *= -1;

    }

    x += 45;

  }

  y += 10;

  x = 0;

​

  fill(0);

  textSize(12);

  textAlign(LEFT);

  text("P.S: if you stare too much, you might get dizzy:))",

    width / 2,

    height / 2 + 10

  );

}

​