let pl,v;

function setup() {

  createCanvas(windowWidth, windowHeight);

  angleMode(DEGREES);

  pl1 =new Planet(windowWidth/4, windowHeight/2,0.2,200);

  pl2 =new Planet(windowWidth/2, windowHeight/4,0.2,300);

  pl3 =new Planet(windowWidth/2, 3*windowHeight/4,0.2,220);

  pl4 =new Planet(3*windowWidth/4, windowHeight/2,0.2,120);

  pl=[pl1,pl2,pl3,pl4]

  for (i=0;i<50;i++){

    v=createVector(random(-2,2),random(-2,2))

  pa =new Particle(random(0,windowWidth),random(0,windowHeight),2,v);

    for(j=0;j<pl.length;j++){

​

    s=new System(pa,pl[j]);

    sys.push(s);

}}

​

}

​

function draw() {

  background(0);

  for(j=0;j<pl.length;j++){

  pl[j].show();}

  for (i=0;i<sys.length;i++){

  sys[i].update();

  sys[i].show();

}

}

​

​

function windowResized() {

   resizeCanvas(windowWidth, windowHeight);

}