let x = 0;

​

function setup() {

  createCanvas(400, 400);

  background(0);

}

​

function draw() {

​

  translate(x, 200);

  let y = map(sin(angle),-1,1,-100,100);

  // ellipse(width)

  stroke(255);

  line(0,0,0,y);

  fill(252, 0, 200);

  circle(x, y, 5); //circle takes diameter

  let increment = TWO_PI/60;

  angle+=increment;

  x+=10;

}

​