I know I'm not first one who starts this topic, but I didn't find answer how to solve problem that I have. (I'm from Serbia, so my English could be bad)
I have to write lisp code that would get block last inserted block and edit it (have to change length of two lines).
Another way is to take block from my base of blocks and edit it before inserting it.
Can someone help me with this? I have headache for days :S