createCanvas(400, 400);

  background(200)

  let spread = width

  let a = 0.0;

  let inc = TWO_PI / spread;

  for (let i = 0; i <= spread; i++) {

    let lineHeight = (1-sin(a+PI/2)) * 20

    console.log(lineHeight)

    line(i, height-lineHeight, i, height);

    a = a + inc;

  }

}