ActionScript 3.0 :: Move Objects Down Y-axis From Top Of Screen To Bottom

I'm creating a simple game and I need to move objects down the y-axis from the top of the screen to the bottom.I want one object specifically to randomly appear and then exit the screen. I'm using a random number generator to test against and call the object to the screen and to move from top to bottom when the random number is greater than 950.The problem is that when the random number generator, generates two numbers in a row over 950 the objects skips back to the top.The animation is nested within the mc. I tried animating it with as3 but it jumps down the screen and doesn't look like a smooth animation.Is their a way that I can track the progress of the mc animation and use an && conditional to only play the animation when it's on, say frame one of the animation?What I want is to say if the movie clip is at frame one(stopped) and the random number is greater than 950 play the clip. If the clip is begin played not at frame one. Don't replay it.[code]