Random block spawn

How can I randomly set/spawn blocks in my world (and remove)? I want to spawn stone blocks all over the world (only over trees and grass...)

 

This is a tricky question. There are many ways to do it, but the method that won't affect the server's performance at all would be to override the generator, which can be done easily.
However, there's a problem you'll be facing..

 

PHP:

$level = $this->getServer()->getLevelByName("Your Level");
$x =mt_ rand(0, 255);
$z = mt_rand(0, 255);
$y = mt_rand($level->getHighestBlockAt($x, $z), 127);
$pos = new Vector3($x, $y, $z);
$block = 5;
$level->setBlock($pos, $block);

This may help you it spawn random block but idk how over tree and grass

 

$block should be Block::get(5)

 

And how can I remove all blocks with that id from the level?

*Your code isn't working (I already added a space to the =)

Code:

 "syntax error, unexpected 'rand' (

 

change

PHP:

$x =mt_ rand(0, 255);

to

PHP:

$x = mt_rand(0, 255);

 

I already did that...

 

But this code now only spawns one block. How can I spawn then in spaces all over the world?

 

How can I spawn the blocks in spaces all over the world?

 

Or ist there another way?

 

As I've already said, a custom generator is your only choice. That's gonna lag your server hard^

 

But how can I do that? And is there a way to add

 

I can't use a generator, because I need to spawn and despawen the blocks in a Minigame. What I the best method?