[FMX]Simulating non-tweening with actionscript

Hi, I have been using actionscript for most of my animation in flash using tweening funtions. I just run into a problem that i really need help with. When using actionscipt, the code on the frame is all executed. There is not waiting except for funtion returns. Ex. let say i have a moive(test_mc) on frame 3 on my maintime line and another keyframe on line 20. Now between frame 3 and 20, nothing is suppose to happen to the movieclip(test_mc) on the timeline. So basically, there is no tweening between from 3 and 20. Now when u execute the movie, everyething befor frame 3 is executed, between from 3 and 20, nothing happens (as the main timeline still plays), then something happens again at frame 20.

Now to assimulate the same thing using actionscript, let say this is my code on frame 1

  1. test_mc.tween(…) -->to do the same thing before frame 3
  2. test_mc.tween(…) —>to do the same thing after frame 20

Flash will execute these code without “grace periode”, so the actions will execute one after the other without a time diffence between both tweening. So essentially, if i want 2) to execute 30 sec after 1), how do i go about it using action script. Some sort of wait function to make time pass or something like that.I hope i have explain myself well. Please help.