function setup() {

  frameRate(30);

  createCanvas(400, 400);

  background(220);

​

}

​

function draw() {

  //xOff += 0.6;

  let x = random(width);

  //let x = 200;

  let y = 100;

  stroke(5, 40);

  strokeWeight(4);

  line(x, 0, x, height);

  if(frameCount > 900) {

    setup();

    frameCount = 0;

  }

}