updateBlockState

public static void updateBlockState(boolean activated, World world, int x, int y, int z)
    {
        int l = world.getBlockMetadata(x, y, z);
        TileEntity tileentity = world.getTileEntity(x, y, z);
        isActivated = true;

        if (activated)
        {
            world.setBlock(x, y, z, Util.blockList.get(0)); //Block active
        }
        else
        {
            world.setBlock(x, y, z, Util.blockList.get(1)); //Block idle
        }

        isActivated = false;
        world.setBlockMetadataWithNotify(x, y, z, l, 2);

        if (tileentity != null)
        {
            tileentity.validate();
            world.setTileEntity(x, y, z, tileentity);
        }
    }