private void updateBlocks(Location origin) {

        Location minimum = origin.clone().subtract(BLOCK_RANGE, BLOCK_RANGE, BLOCK_RANGE);
        Location maximum = origin.clone().add(BLOCK_RANGE, BLOCK_RANGE, BLOCK_RANGE);

        Map<ChunkPosition, ChunkSnapshot> snapshotList = new HashMap<>();

        for (int x = minimum.getBlockX(); x <= maximum.getBlockX() + 16; x+=16) { //The "loop in main" that you told me before, i guess
            for (int z = minimum.getBlockZ(); z <= maximum.getBlockZ() + 16; z+=16) {
                snapshotList.put(new ChunkPosition(x 16, z 16), origin.getWorld().getChunkAt(new Location(origin.getWorld(), x, 1, z)).getChunkSnapshot()); //gets all the blocks that have to be analyzed and put in a HashMap
            }
        }

        Vector originVector = origin.toVector(); //idk what a vector is
        for(ChunkPosition chunkPosition : snapshotList.keySet()) { //Divides the work in chunks
            ChunkSnapshot snapshot = snapshotList.get(chunkPosition);

            new Thread(() -> {
                for (int x = 0; x < 16; x++) {
                    for (int z = 0; z < 16; z++) {
                        for (int y = (int) (origin.getY() - BLOCK_RANGE); y < origin.getY() + BLOCK_RANGE; y++) { //its gets every block in y and then it goes up by one block
                            int realX = chunkPosition.getChunkX() 16 + x;
                            int realZ = chunkPosition.getChunkZ() 16 + z;

                            Vector position = new Vector(realX, y, realZ); //idk what a vector is 

                            if (position.distance(originVector) > BLOCK_RANGE) //what
                                continue;

                            Material type = snapshot.getBlockType(x % 0xF, y, z % 0xF);

                            if(shouldBreak(type)) //what is it
                                synchronized (blockList) {
                                    blockList.add(new Location(origin.getWorld(), chunkPosition.getChunkX() << 4 | x, y, chunkPosition.getChunkZ() << 4 | z)); //add the breakable block to an HashMap
                                }
                        }
                    }
                }
            }).start();
        }
    }