Using advertisement Key

[Fierce God]

I want to put start to put ads on the sides of my live streams that members have on my server.

I cant find the right place using the ad key, to put the add to make it show on both sides...i will show a picture

I may have the wrong look on how to do this, can someone tell me what i need to make this happen??

i know i have to go into the theme css, but i can't seem to make the ad show on both sides, but on top and bottom