BlitBitmap(tmp_bitmap_1, new_bitmap, 0, 0, width_1, height_1, 0, 0);
BlitBitmap(tmp_bitmap_2, new_bitmap, 0, 0, width_1 / 2, height_1 / 2,
0, height_1);
BlitBitmap(tmp_bitmap_1, new_bitmap, 0, 0, width_1, height_1, 0, 0);
BlitBitmap(tmp_bitmap_2, new_bitmap, 0, 0, width_1 / 2, height_1 / 2,
0, height_1);