Oldschool pseudo3D floating spheres

Pseudo3D_floating_spheres.pde

//References:
//https://www.dwitter.net/d/11965
//https://www.dwitter.net/d/11981
float t;
void setup() {
  size(1280, 720);
  noStroke();
  fill(0, 255, 0);
}
void draw() {
  t+=.01;
  clear();
  for (float i=2e3; i>0; i--) {
    float q=i*i;
    float Q=sin(q);
    float b = i%6+t;//6 spheres
    //float b = i%6+t+i;//torus
    float p=i+t;
    float z=9+cos(b)*3+cos(p)*Q;
    float s=99/z/z;//dot size
    
    //rotating in orbit
    rect(width/2*(z+sin(b)*3+sin(p)*Q)/z, height/2 + width/2 * (cos(q)-cos(b+t))/z, s, s);
    
    //going up and towards the screen
    z+=5*tan(b); //z+=5*sin(b);
    s=99/z/z;//dot size
    s=(s>99)?1:s;
    rect(width/2*(z+sin(b)*3+sin(p)*Q)/z, height/2 + width/2 * (cos(q)-tan(b+t))/z, s, s);
  }
}