​

function setup() {

  createCanvas(400, 400);

  angleMode(DEGREES);

}

​

function draw() {

  background(0,50);

  a += 1;

  console.log(a);

  push();

  translate(width/2,height/2);

  rotate(a);

  let x = sin(a)*50;

  let y = cos(a)*150;//0;

  let radius = map(sin(a),-1,1,50,150);

  noStroke();

  ellipse(radius,0,30,30);

  ellipse(x,y,30,30);

  pop();

}