public void checkDrops()
	{
		boolean changed = false;
		for (int i=blocks[0].length-1; i > 0 ; i--) // push them all the way down
		{
			for (int x=0; x < blocks.length; x++) // X axis
			{
				for (int y=blocks[0].length-1; y > 0 ; y--) // Y axis
				{
					Block b1 = blocks[x][y];
					Color c1 = b1.getColor();
					Block b2 = blocks[x][y-1];
					Color c2 = b2.getColor();
					if (c1.equals(Color.BLACK))
					{
						if (!c1.equals(c2))
							changed = true;
						
						b1.setColor(c2);
						b2.setColor(c1);
					}	
				}
			}
		}
		if (changed)
			checkCombos();
	}