Show starting

Hello guys!
I'm using Airtime 2.0.3 wth an external icecast server.
I've configured ls_script.liq to play a random playlist with jingle when there are no show scheduled. When a scheduled show starts, the random playlist instantly stop and restart from this point at show finish. What can I configure that when a show starts liquidsoap dissolve current song, play a jingle and start show and at finish the playlst restart from new song? I've done this for live fallback according to http://savonet.sourceforge.net/on2_part2.html (starting from "A nice transition!") and work well. I want to do the same  for airtime shows.

Thanks.

Ivan