loading two different movie clips in an interval

So far, I've created a loader swf that just has the action script below in
the first frame.

I do not get a script error, however, it is not loading the wanted swf files
either.

I think it is because I do not have an action to load - I've created a
variable with the loadmovie and then an if statement to change the
variable's value. I then have the code to create the interval.

I am a beginner coder, so I am hoping any help will be done in a manner that
I might learn.

TIA,
Greg

toBePlayed =
loadMovie(" http://www.kfog.com/kfogxml/np_kfog_3_single.swf",self);

if (toBePlayed =
loadMovie(" http://www.kfog.com/kfogxml/np_kfog_3_single.swf",self)){
toBePlayed =
loadMovie(" http://www.kfog.com/kfogxml/onairnow.swf",self);
} else {
toBePlayed =
loadMovie(" http://www.kfog.com/kfogxml/np_kfog_3_single.swf",self);
};


myInterval = setInterval(toBePlayed,30000);