# [1.7.10] Generate blocks on grass

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hello!

How I can edit the code to generate blocks on top grass on the surface?

```	private void runGenerator(WorldGenerator generator, World world, Random rand, int chunk_X, int chunk_Z, int chancesToSpawn, int minHeight, int maxHeight) {
if (minHeight < 0 || maxHeight > 256 || minHeight > maxHeight)
throw new IllegalArgumentException("Illegal Height Arguments for WorldGenerator");

int heightDiff = maxHeight - minHeight + 1;
for (int i = 0; i < chancesToSpawn; i ++) {
int x = chunk_X * 16 + rand.nextInt(16);
int y = minHeight + rand.nextInt(heightDiff);
int z = chunk_Z * 16 + rand.nextInt(16);
generator.generate(world, rand, x, y, z);
}
}```

pss edit my code, many thanks!

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u will need to find the surface block, I am not sure if vanilla has a method for that, or if u need to iterate over the blocks in the world until u find a grass block. after that add 1 to the y pos and u are above the grass

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yes...

if someone bothers to edit my code, I would greatly appreciate it, i dont know how make this...

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show ur attempts, ask specific questions

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i use the last code for the ores generator, but i need make a replicate  the same code for generate blocks on the surface and on top the grass block

this is the .java

```package com.colorescraftmod.principal.items;

import java.util.Random;

import net.minecraft.block.Block;
import net.minecraft.init.Blocks;
import net.minecraft.world.World;
import net.minecraft.world.chunk.IChunkProvider;
import net.minecraft.world.gen.feature.WorldGenMinable;
import net.minecraft.world.gen.feature.WorldGenerator;

import cpw.mods.fml.common.IWorldGenerator;

public class ModWorldGen implements IWorldGenerator {

private WorldGenerator multiore;		//Generates Multi Ore (used in Overworld)

public ModWorldGen() {
this.multiore = new WorldGenSingleMinable(ModItems.multiore);
// this.gen_cobblestone = new WorldGenMinable(Blocks.cobblestone, 16, Blocks.end_stone);
}

@Override
public void generate(Random random, int chunkX, int chunkZ, World world, IChunkProvider chunkGenerator, IChunkProvider chunkProvider) {
switch (world.provider.dimensionId) {
case 0: //Overworld
//this.runGenerator(this.gen_multi_ore, world, random, chunkX, chunkX, 20, 0, 64);

this.runGenerator(this.multiore, world, random, chunkX, chunkZ, 1120, 0, 254);

break;
case -1: //Nether

break;
case 1: //End

break;
}
}

private void runGenerator(WorldGenerator generator, World world, Random rand, int chunk_X, int chunk_Z, int chancesToSpawn, int minHeight, int maxHeight) {
if (minHeight < 0 || maxHeight > 256 || minHeight > maxHeight)
throw new IllegalArgumentException("Illegal Height Arguments for WorldGenerator");

int heightDiff = maxHeight - minHeight + 1;
for (int i = 0; i < chancesToSpawn; i ++) {
int x = chunk_X * 16 + rand.nextInt(16);
int y = minHeight + rand.nextInt(heightDiff);
int z = chunk_Z * 16 + rand.nextInt(16);
generator.generate(world, rand, x, y, z);
}
}
}
```

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so u have copy pasted code from TheBedrockMiner.

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yes... but you can help me? xDD

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not until u understood what hes doing there and are able to ask me a specific question. im not gonna write ur mod 4 u

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Are you creating a surface ore? If you are than perhaps you could create a method for your y coordinate that creates a blockPos list of all the blocks in the x z area that is randomized by your code, then iterate through it till the block type is grass, then add 1, and you should have it.

Just a suggestion. Also, please know what you are saying before you post, it really helps everyone else.

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only need a function for generate blocks on the surface... is only edit the last code... no make all the code

i don't know program anything :C

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the code u posted is not even urs. study more and come back with a question

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my question is on my first post...

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u will need to find the surface block, I am not sure if vanilla has a method for that, or if u need to iterate over the blocks in the world until u find a grass block. after that add 1 to the y pos and u are above the grass

and i answered that

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but this no help me because i don't know how edit the code,i don't know program anything

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we wont write ur mod 4 u.

If u want to write ur own mod learn java. then come back. or find some1 u can pay to write ur mod. but dont expect us to help u without u learning java.

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maybe someone already has something similar to what I want or can spend a tutorial

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If you want to learn how to generate blocks on the surface look in WorldGenTallGrass to see how it is done there.

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