let y=100;

function setup() {

  createCanvas(400, 400);

}

​

​

function draw() {

  background('#00aaff');

    fill(255, 255, 255);

    noStroke();

  cloud()

if(frameCount%100===0)

  {

    y=mouseY

    x=100

  }

  x++

}

function cloud()

{

  arc(x, y, 25 * 0.8, 20 * 0.8, PI + TWO_PI, TWO_PI);

    arc(x + 10, y, 25 * 0.8, 45 *0.8, PI + TWO_PI, TWO_PI);

    arc(x + 25, y, 25 * 0.8, 35 * 0.8, PI + TWO_PI, TWO_PI);

    arc(x + 40, y, 30 * 0.8, 20 * 0.8, PI + TWO_PI, TWO_PI);

}