const y = 75;

const w = 250;

const h = 200;

const r = 40;

const cX = x + r;

const cY = y + r;

const dt = Math.PI / 8;

​

function setup() {

  createCanvas(400, 400);

}

​

function draw() {

  background(220);

  rect(x, y, w, h);

  arc(cX, cY, 2 * r, 2 * r, PI, 3 * PI / 2);

  push();

  strokeWeight(4);

  for (i = 0; i < 5; i++)

    point(cX - r * cos(i * dt), cY - r * sin(i * dt));

  pop();

}