Random movie loads

I am loading movies at random starting with the following AS:

this.createEmptyMovieClip("bground", 1);
bground._x = 0;
bground._y = 0;

var myClips:Array = new Array("buzz_design1.swf", "buzz_design2.swf", "buzz_design3.swf", "buzz_design4.swf", "buzz_design5.swf", "buzz_design6.swf", "buzz_design7.swf");

var currentClip = random(myClips.length);
bground.loadMovie("buzzwords/" + myClips[currentClip]);

stop();


At the end of each loaded MC I have:
this.loadMovie("buzzwords/" + _root.myClips[random(_root.myClips.length)]);

stop();


How do I ensure the same movie is not loaded twice in a row? Many thanks.