createCanvas(400, 400);

  angleMode(DEGREES);

}

​

function draw() {

  background(255);

  scale(4);

  grid(10);  // This line will not work on your sketch!

  fill('red');

  ellipse(50, 50, 50);

}

​

function grid(inc) {

  for (let x = 0; x < width; x+=inc) {

    line(x, 0, x, height);

  }

  for (let y = 0; y < height; y+=inc) {

    line(0, y, width, y);

  }

}