Snow

int count = 200;

int snowx[]= new int[count];

int snowy[]= new int[count];

int speed[]= new int[count];

int size[]= new int[count];

void setup() {

  size(320, 200);

 

  for(int i=0; i<count; i++) {

    snowx[i] = (int)random(0, 320);

    snowy[i] = (int)random(0, 200);

    speed[i] = (int)random(1, 4);

    size[i] = (int)random(1, 5);

  }

}

void draw() {

  background(0);

  for(int i=0; i<count; i++) {

    ellipse(snowx[i], snowy[i], size[i], size[i]);

    snowy[i]+=speed[i];

    if(snowy[i] >= 200) {

      snowy[i] = 0;

      snowx[i] = (int)random(0, 320);

      speed[i] = (int)random(1, 4);

      size[i] = (int)random(1, 5);

    }

  }

}