E in 3D experiment

[Devante]

Hey guys,
I was looking at this experment http://www.kirupa.com/lab/ein3d.htm . I understand how to do the ‘E’, but how can I write ‘B’?

Thanks

[system]

http://www.kirupaforum.com/forums/showthread.php?s=&threadid=33337

(among others)