let r = 190;

let a = 0;

​

let posX;

​

function setup() {

  createCanvas(400, 400);

  background(220);

  posX = 0

  // frameRate(5)

}

​

function draw() {

  background(220, 3);

  translate(posX, height/2)

  rotate(a)

  let x = cos(t) * r;

  let y = sin(t) * r;

  // circle(0, 0, r*2)k

  stroke(0)

  fill(255)

  circle(x, y, r/8)

  noFill()

  stroke(255, 0, 0)

  // circle(0, 0, r*2)

  // line(0, 0, x, 0);

  // line(0, 0, 0, y)

  // line(x, 0, 0, y)

  // line(x, y, 0, y)

  // line(x, y, x, 0)

  // line(0, 0, x, y)

  t += 0.01;

  r -= 0.367;

  // a += 0.5

  posX += 0.5;

  if (r < -190) r = 190;

  if (posX > width) posX = 0

}