SRB2 Doom Builder Q

[Differences]

Right... I've been trying a few things and looking around for a while, and I can't find the answers to this question anywhere... the wiki doesn't really explain how to do this properly, so, I'll ask here:

How do you make a block breakable? o.o

 

[MascaraSnake]

You make an FOF with Linedef Type 254 and give the control sector the Bustable Block sector effect.

Look here for more information:
http://wiki.srb2.org/wiki/Bustable_Block_Sprite_Picker
http://wiki.srb2.org/wiki/Linedef_Type_254