Idea from ThaumicTom.

These are custom blocks. Place them in your blocks folder.

In-game, they can be found in block folders:
5-7-1-1
5-8-1-1
5-8-2-1

6-7-1-1
6-8-1-1
6-8-2-1

7-7-1-1
7-8-1-1
7-8-2-1

8-7-1-1
8-8-1-1
8-8-2-1