createCanvas(400, 400);

  // set cyan backgound

  background('#00ffff');

  // set line color to red

  stroke('red');

  // make lines wide

  strokeWeight(25);

  // draw line from top-left corner to bottom-right

  line(0, 0, width, height);

  // draw green circle in center of screen

  noStroke();

  fill('#00c800');

  const d = 200;

  circle(width/2, height/2, d);

  // draw small blue rectangle on right edge of circle

  fill('#000080');

  const rw = 20;

  const rh = 25;

  rect(width/2 + d/2 - rw, height/2 - rh, rw, rh);

}

​