Code

import net.minecraftforge.fml.relauncher.SideOnly;
import net.minecraftforge.fml.relauncher.Side;
import net.minecraftforge.fml.common.registry.GameRegistry;
import net.minecraftforge.fml.common.event.FMLServerStartingEvent;
import net.minecraftforge.fml.common.event.FMLPreInitializationEvent;
import net.minecraftforge.fml.common.event.FMLInitializationEvent;

import net.minecraft.world.World;
import net.minecraft.world.IBlockAccess;
import net.minecraft.util.math.BlockPos;
import net.minecraft.util.math.AxisAlignedBB;
import net.minecraft.util.EnumFacing;
import net.minecraft.util.DamageSource;
import net.minecraft.util.BlockRenderLayer;
import net.minecraft.item.ItemStack;
import net.minecraft.item.ItemBlock;
import net.minecraft.item.Item;
import net.minecraft.init.Blocks;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.entity.Entity;
import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.client.renderer.block.model.ModelResourceLocation;
import net.minecraft.client.Minecraft;
import net.minecraft.block.state.IBlockState;
import net.minecraft.block.material.Material;
import net.minecraft.block.SoundType;
import net.minecraft.block.Block;

import java.util.Random;

public class mcreator_infectious {

    public mcreator_infectious() {
    }

    public static BlockInfectious block;

    public static Object instance;

    public int addFuel(ItemStack fuel) {
        return 0;
    }

    public void serverLoad(FMLServerStartingEvent event) {
    }

    public void preInit(FMLPreInitializationEvent event) {
        block.setRegistryName("infectious");
        GameRegistry.register(block);
        GameRegistry.register(new ItemBlock(block).setRegistryName(block.getRegistryName()));
    }

    public void registerRenderers() {
    }

    public void load(FMLInitializationEvent event) {
        if (event.getSide() == Side.CLIENT) {
            Minecraft.getMinecraft().getRenderItem().getItemModelMesher()
                    .register(Item.getItemFromBlock(block), 0, new ModelResourceLocation("testenvironmentmod:infectious", "inventory"));
        }

        GameRegistry.addRecipe(new ItemStack(block, 1), new Object[]{"XXX", "X4X", "XXX", Character.valueOf('4'), Blocks.DIRT,});
    }

    static {

        block = (BlockInfectious) (new BlockInfectious().setHardness(0.0F).setResistance(0.0F).setLightLevel(1.0F).setUnlocalizedName("Infectious")
                .setLightOpacity(0).setCreativeTab(CreativeTabs.MISC));
        block.setHarvestLevel("pickaxe", 0);
    }

    public void generateSurface(World world, Random random, int chunkX, int chunkZ) {
    }

    public void generateNether(World world, Random random, int chunkX, int chunkZ) {
    }

    static class BlockInfectious extends Block {

        int a1 = 0, a2 = 0, a3 = 0, a4 = 0, a5 = 0, a6 = 0;

        boolean red = false;

        protected BlockInfectious() {
            super(Material.LEAVES);

            setSoundType(SoundType.GROUND);

        }

        @Override
        public void onBlockAdded(World world, BlockPos pos, IBlockState state) {
            int i = pos.getX();
            int j = pos.getY();
            int k = pos.getZ();
            world.scheduleUpdate(new BlockPos(i, j, k), this, this.tickRate(world));

        }

        @Override
        public int getWeakPower(IBlockState blockState, IBlockAccess blockAccess, BlockPos pos, EnumFacing side) {
            return red ? 15 : 0;
        }

        @Override
        public int getStrongPower(IBlockState blockState, IBlockAccess blockAccess, BlockPos pos, EnumFacing side) {
            return red ? 15 : 0;
        }

        @Override
        public void randomDisplayTick(IBlockState state, World world, BlockPos pos, Random random) {
            EntityPlayer entity = Minecraft.getMinecraft().player;
            int i = pos.getX();
            int j = pos.getY();
            int k = pos.getZ();
            if (true) {
                world.setBlockState(new BlockPos(i + 1, j, k), mcreator_infectious.block.getDefaultState(), 3);
                 world.setBlockState(new BlockPos(i, j + 1, k), mcreator_infectious.block.getDefaultState(), 3);
                    world.setBlockState(new BlockPos(i, j, k + 1), mcreator_infectious.block.getDefaultState(), 3);
                    world.setBlockState(new BlockPos(i - 1, j, k), mcreator_infectious.block.getDefaultState(), 3);
                    world.setBlockState(new BlockPos(i, j - 1, k), mcreator_infectious.block.getDefaultState(), 3);
                    world.setBlockState(new BlockPos(i, j, k - 1), mcreator_infectious.block.getDefaultState(), 3);
            }

        }

        @Override
        public void onEntityCollidedWithBlock(World world, BlockPos pos, IBlockState state, Entity entity) {
            int i = pos.getX();
            int j = pos.getY();
            int k = pos.getZ();
            if (true) {
                entity.attackEntityFrom(DamageSource.GENERIC, 200);
            }

        }

        @SideOnly(Side.CLIENT)
        @Override
        public BlockRenderLayer getBlockLayer() {
            return BlockRenderLayer.SOLID;
        }

        @Override
        public AxisAlignedBB getBoundingBox(IBlockState state, IBlockAccess source, BlockPos pos) {
            return new AxisAlignedBB(0.0D, 0.0D, 0.0D, 1.0D, 1.0D, 1.0D);
        }

        @Override
        public int tickRate(World world) {
            return 10;
        }

        @Override
        public int quantityDropped(Random par1Random) {
            return 0;
        }

        @Override
        public Item getItemDropped(IBlockState state, Random par2Random, int par3) {
            return new ItemStack(Blocks.DIRT, 1, 1).getItem();
        }
    }
}