1. Go to the advenced create mode
2. Press "E" to choose or select a block
3. use 4 ghosts
4. double click on them
5. color them with Material
6. you can remove move, collide damage, or destructible
7. it's done

also I saw @JJTEVES__ new game and also check the link:

https://hiberworld.com/p/3UKJ0rw2C