Wonderful! Thank you both!
I'm actually quite embarrassed now since Heavy doesn't support internal messages but regular messages are just fine so the whole thing was actually sorted just like mentioned in earlier comments:

[ const 0 (
|
[s table]

@jancsika Thanks for answer! Unfortunately it doesn't support list object.

Heavy compiler doesn't support |define array| yet nor the message boxes. Is there a way to clear table some way other than through message?