function setup() {

  createCanvas(windowWidth, windowHeight);

​

  noFill();

}

​

function draw() {

  background(0);

  stroke(200);

  beginShape();

​

  translate(200, 200);

  for (let i = 0; i < 50; i+=0.01){

    x = cos(i) * 50;

    y = sin(i) * 50;

    vertex(x, y);

  }

  endShape();

}