const atm = 1;

const it = 500;

const ground = 100;

let dt;

let s;

​

function setup() {

  dt = 1/sqrt(it);

  createCanvas(1080, 720);

  s = new Softbody(width / 2, height / 2, 100, 10, 69, 0.1, 0.5);

}

​

function draw() {

  // frameRate(1);

  background(0);

  push();

  stroke(255);

  line(-width, height - ground, width * 2, height - ground);

  pop();

  s.gravitate();

  s.updateForces();

  s.updatePos();

  s.display();

}