public void disappear() {
		for (int i = 0; i < Yard.YARD_ROW; i++) {
			boolean flag = true;
			for (int j = 0; j < Yard.YARD_COL; j++) {
				if( blocks[i][j] == false) {
					flag = false;
					continue;
				}
			}
			
			if (flag == true) {
				score++;
				for (int i2 = i; i2 > 0; i2--) {
					for (int j2 = 0; j2 < Yard.YARD_COL; j2++) {
						blocks[i2][j2] = blocks[i2 - 1][j2];
					}
				}
				repaint();
			}
		}
	}