Solved Loop blocks between two locations

[MasterHunter2003]

Question: I am trying to make a fire creeper, problem is that the block looping doesn't seem to work. Does someone know how I could fix this?

@EventHandler
    public void onExplode(EntityExplodeEvent e){
        if(e.getEntity() instanceof Creeper){
            Creeper c = (Creeper) e.getEntity();
            if(c.getCustomName() != null){
              if(c.getCustomName().equalsIgnoreCase("Fire Creeper")){
                 Location blockLoc = c.getLocation().add(6, 6, 6);
                 Location blockLoc2 = c.getLocation().add(6, 6, 6);
                 List<Block> blocks = getRegionBlocks(c.getWorld(), blockLoc, blockLoc2);
                 for(Block block : blocks) {
                     block.setType(Material.DIAMOND_BLOCK);
                 }
              }
            }
        }
    }
   
    public List<Block> getRegionBlocks(World world, Location loc1, Location loc2) {
        List<Block> blocks = new ArrayList<Block>();

        for(double x = loc1.getX(); x <= loc2.getX(); x++) {
            for(double y = loc1.getY(); y <= loc2.getY(); y++) {
                for(double z = loc1.getZ(); z <= loc2.getZ(); z++) {
                    Location loc = new Location(world, x, y, z);
                    blocks.add(loc.getBlock());
                }
            }
        }

        return blocks;
    }

 

[ShaneBee]

Not sure if it would fix but do not create instance of locations, get it from blocks in World#getBlockAt

blocks.add(loc1.getWorld().getBlockAt(x, y, z))

Edit:
The issue is here:

Location blockLoc = c.getLocation().add(6, 6, 6);
Location blockLoc2 = c.getLocation().add(6, 6, 6);

You are getting the same location basically