private void renderBlocks(Screen screen) {
		for (int y = HIDDEN_ROWS; y < rows.length; y++) {
			Block[] row = rows[y];
			for (int x = 0; x < row.length; x++) {
				Block block = row[x];
				if (block == null) {
					//screen.renderBlank(x*BLOCK_SCALE+getX(), y*BLOCK_SCALE+getY(), BLOCK_SCALE, BLOCK_SCALE, 0x00ff00);
				}
				else {
					screen.render(x*BLOCK_SCALE+getX(), (y-HIDDEN_ROWS)*BLOCK_SCALE+getY(), Tetromino.getSprite(block.getType()));
				}
			}
		}
	}