void setup()
{
  size(800, 600);

  stroke(255);
}

//int flottement = 0;
int nombreparticules = 40;

void draw() {
  int paddingx = width/(nombreparticules+1);
  int paddingy = height/(nombreparticules+1);
  //int taillegrille = 40;

  background(0);

  for (int i = 0; i<nombreparticules+1; i++) {
    for (int j = 0; j<nombreparticules+1; j++) {
      point(paddingx+random(mouseX)+i*paddingx-mouseX/2,paddingy+random(mouseX)+j*paddingy-mouseX/2);
    }
  }
}

//void keyPressed() {
//  if (key == 'a') {
//   flottement+=1;
//  }else{
//   flottement=0;
//  }
//}