int tile = width/20;
int half = tile/2;
float size = tile/2; 

translate(tile/2, tile/2);


  for (int y=0; y<height; y+=tile) {
    for (int x=0; x<width; x+=tile) {
      pushMatrix();
      translate (x, y);
      rotate(degrees(angle));
      rect(0, 0, size, size);
      //line(x-half, y-half, x+half, y+half);
      popMatrix();
    }
  }