let earthRotspeed = 0.01; 

let moonRot = 0; 

let moonRotspeed = 0.009; 

​

function setup() {

  createCanvas(300, 300);

  strokeWeight(0.7);

}

​

function draw() {

  background("#EEEEEE");

  earthRot += earthRotspeed; 

  moonRot += moonRotspeed; 

​

  fill("OrangeRed");

  ellipse(width/2, height/2, 140, 140); 

​

  translate(width/2, height/2);

  rotate(moonRot); 

  translate(-width/2, -height/2);

  fill("LightSeaGreen");

  ellipse(width/2, 230, 20, 20); 

}