const G = 2;

const dt = 0.05;

​

let m87;

​

const particles = [];

let start, end;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  ellipseMode(RADIUS);

  m87 = new BlackHole(width / 2, height / 2, 3000);

  start = height / 2;

  end = height / 2 - m87.rs * 2.6;

  for (let y = 0; y < start; y += 5) {

    particles.push(new Photon(width - 20, y));

  }

}

​

function draw() {

  background(255);

  for (let p of particles) {

    const force = m87.pull(p);

    p.update();

    p.show();

  }

  m87.show();

}

​