processing sketch with japaneese-like charachters

jap.java

int grid = 24;

void setup() {
  size(1600, 900);
  frameRate(0.3);
  //noLoop();
}

void draw_letter(int strokes, float size, float x, float y) {
  for (int p = 0; p < strokes; p++) {
    float[] xps = new float[4];
    float[] yps = new float[4];
    for (int i = 0; i < 4; i++) {
      xps[i] = random(0, size) + x;
      yps[i] = random(0, size) + y;
    }
    stroke(random(0,30));
    strokeWeight(random(1, 3));
    noFill();
    bezier(xps[0], yps[0], 
      xps[1], yps[1], 
      xps[2], yps[2], 
      xps[3], yps[3]);
  }
}


void draw() {
  background(255);
  for (int y = 0; y < height; y += height/grid) {
    for (int x = 0; x < width; x += width/grid) {
      draw_letter((int)random(1, 4), grid-3, x, y);
    }
  }
  saveFrame("znaczki####.png");
}