// Voir http://processing.org/reference/Array.html

int num = 20;
int[] dx = new int[num];  // Declare et cree un tableau
int[] dy = new int[num];  // Declare et cree un tableau

void setup() {
  size(100, 100);
  for (int i = 0; i < num; i++) {
    dx[i] = i * 5;
    dy[i] = 12 + (i * 6);
  }
}

void draw() {
  background(204);
  for (int i = 0; i < num; i++) {
    dx[i] = dx[i] + 1;
    if (dx[i] > 100) {
      dx[i] = -100;
    }
    diagonals(dx[i], dy[i]);
  }
}
void diagonals(int x, int y) {
  line(x, y, x+20, y-40);
  line(x+10, y, x+30, y-40);
  line(x+20, y, x+40, y-40);
}