@Override
				           public void run() {
				               for(int i = 0; i < inv.getContents().length; i++) {
				                   ItemStack is = inv.getItem(i);
				                   ItemStack BlackStain = new ItemStack(Material.STAINED_GLASS_PANE, 1, (byte)15);
				                   if(is.getType() == Material.STAINED_GLASS || is.getType() == Material.STAINED_GLASS_PANE) {

				                	   if (is.getItemMeta()) {
				                		   inv.setItem(i, new ItemStack(Material.STAINED_GLASS_PANE, 1, (byte) (new Random().nextInt(6)+1)));
				                	   }

				                   }