class Particle{

  public float x = 0;
  public float y = 0;
  public float vx = 0;
  public float vy = 0;
  public float k = .01;
  public boolean lines = false;

  public void Particle() {
  }

  public void move(float s){
    
    s*=50;
    vx += random(-s,s);
    vy += random(-s,s);
    vx *= cos((2*PI)*s);
    vy *= sin((2*PI)*s);
    x += vx;
    y += vy;

    if(x > w) vx *= -1;
    if(x < 0) vx *= -1;
    if(y > h) vy *= -1;
    if(y < 0) vy *= -1;

  }

  public void render(float sp){
    smooth();
    stroke(0, 191);
    float spc=sp/60;
    if(spc<0) spc*=-1;
    ellipse(x,y,spc,spc);

  }
}