Bulldozer

The following commands work:

1. /tool
2. /box -rc
3. /box -rb
4. /box -ac
5. /box -ab
6. /clear
7. /clearall
8. /undo
9. /wipeundo

Additional values have been programmed, so you can do:

1. /box -rb 5
2. That will take the lowest block in your selection and remove the blocks between your selection and 5 blocks below it.
3. /box -ab 1 7 5
4. That will replace all the blocks between your selection with stone (Block ID: 1) and make 5 blocks above and 7 blocks below the selection also stone.

Other shapes have yet to be implemented.

The code for /undo could use some optimizations, but it works as intented.

Doing /undo for "-rc" or "-ac" will roll back one chunk at a time. The chunk that will be rolled back first is based off the first block selection.