Code

public void OnUpdate(ItemStack par1ItemStack, World par2World, Entity par3Entity, int par4, boolean par5) {
         EntityPlayer player = (EntityPlayer) par3Entity;
         Random random = null;


        int range = 10;
        for(int i = -range; i < range + 1; i++) {
            for(int j = -range; j < range + 1; j++) {
            for(int k = -range; k < range + 1; k++) {
if(par2World.getBlock(player.chunkCoordX, player.chunkCoordY, player.chunkCoordZ)==Block.getBlockById(11)||par2World.getBlock(player.chunkCoordX, player.chunkCoordY, player.chunkCoordZ)==Block.getBlockById(10)||par2World.getBlock(player.chunkCoordX+i, player.chunkCoordY, player.chunkCoordZ)==Block.getBlockById(10)||par2World.getBlock(player.chunkCoordX+i, player.chunkCoordY, player.chunkCoordZ)==Block.getBlockById(11)||par2World.getBlock(player.chunkCoordX, player.chunkCoordY+j, player.chunkCoordZ)==Block.getBlockById(10)||par2World.getBlock(player.chunkCoordX, player.chunkCoordY+j, player.chunkCoordZ)==Block.getBlockById(11)||par2World.getBlock(player.chunkCoordX, player.chunkCoordY, player.chunkCoordZ+k)==Block.getBlockById(10)||par2World.getBlock(player.chunkCoordX, player.chunkCoordY, player.chunkCoordZ+k)==Block.getBlockById(11)){
                        if(random.nextInt(2000)+1==1){
                        player.inventory.armorInventory[0].damageItem(1, player);
                        player.inventory.armorInventory[1].damageItem(1, player);
                        player.inventory.armorInventory[2].damageItem(1, player);
                        player.inventory.armorInventory[3].damageItem(1, player);
                        }
                    }
            }
}
        }
    }