// Daniel Shiffman

// http://natureofcode.com

​

let startAngle = 0;

let angleVel = 0.05;

​

function setup() {

  createCanvas(640, 360);

  colorMode(RGB, 255, 255, 255, 100);

}

​

function draw() {

  background(51);

  startAngle += 0.015;

  let angle = startAngle;

 for (let x = 0; x <= width; x += 24) {

    let y = map(sin(angle),-1,1,0,height);

    noStroke();

    fill(255,100);

    ellipse(x,y,16,16);

    angle += angleVel;

  } 

}