public class myfluid extends BlockFluidClassic
{

	@SideOnly(Side.CLIENT)
	protected IIcon stillIcon;
	@SideOnly(Side.CLIENT)
	protected IIcon flowingIcon;

	public myfluid(Fluid fluid, Material material)
	{
		super(fluid, material);
		this.setBlockName("yourFluid");
		setCreativeTab(CreativeTabs.tabMisc);
	}

	@Override
	public IIcon getIcon(int side, int meta)
	{
		return (side == 0 || side == 1) ? stillIcon : flowingIcon;
	}

	@SideOnly(Side.CLIENT)
	@Override
	public void registerBlockIcons(IIconRegister iconRegister)
	{
		stillIcon = iconRegister.registerIcon(NameReferences.MOD.ID + ":fluidStill.png");
		flowingIcon = iconRegister.registerIcon(NameReferences.MOD.ID + ":fluidFlowing.png");
	}

	@Override
	public boolean canDisplace(IBlockAccess world, int x, int y, int z)
	{
		if (world.getBlock(x, y, z).getMaterial().isLiquid()) return false;
		return super.canDisplace(world, x, y, z);
	}

	@Override
	public boolean displaceIfPossible(World world, int x, int y, int z)
	{
		if (world.getBlock(x, y, z).getMaterial().isLiquid()) return false;
		return super.displaceIfPossible(world, x, y, z);
	}