/**
rain by <a href="http://www.local-guru.net/">Guru</a>
*/

int[] speed;
int[] pos;

void setup() {
  size(300,300);
  smooth();
  speed = new int[100];
  pos = new int[100];
  for( int i = 0; i<100; i++) {
    speed[i] = int(random(10, 30));
    pos[i] = int(random(0,100));
  }
  frameRate(30);
}

void draw() {
  background(255);
  stroke(0);
  translate(width/2,height/2);
  rotate(PI/2.4);

  translate(-width/2,-height/2);
  for( int i = 0; i<100; i++) {
    line(pos[i], i* 4, pos[i] + speed[i]*4, i * 4 );
    pos[i] += speed[i];
    pos[i] = pos[i] % width;
  }
}