p5js--StarField

var number= 1000;


class Star{

  constructor(){
    this.x=random(-0.006*width,0.006*width)
    this.y=random(-0.006*height,0.006*height)

    this.ox=random(-0.006*width,0.006*width)
    this.oy=random(-0.006*height,0.006*height)


    this.size=1
    this.vel=1
  }

  show(){
    fill(255);
    translate(width/2,height/2);
    ellipse(this.x,this.y,this.size,this.size);
    stroke(255)
    strokeWeight(0.01)
    line(this.x,this.y,0,0)
    translate(-width/2,-height/2);



  }
  move(){
    this.x=(this.x*this.vel)
    this.y=(this.y*this.vel)
    this.vel+=this.vel/(width+height)/1
    this.size=map(abs(this.x)+abs(this.y)/2,0,width/2+height/42,2,10)
  }

  reborn(i){
    if(this.x>width/2||this.x<-width/2||this.y>height/2||this.y<-height/2){
      s[i]=new Star()
    }
  }


}


let s= [];
let start=true;

function setup() {

  createCanvas(600, 400);
  frameRate(120);

  for(let i=0;i<number;i++){
    s[i]=new Star();
  }


}

function draw() {

   background(0);
  if(start){
     for(let i=0;i<10000;i++){
   for(let i=0;i<number;i++){

      s[i].move()
      s[i].reborn(i)
    }
     }
  start=false
  }
     for(let i=0;i<number;i++){
      s[i].show()
      s[i].move()
      s[i].reborn(i)
    }


}