Reverse play; MC to MC integration

[Leo Korchenko]

Hello, I have a problem with ActionScript.

Here is my situation:
I have a light bulb and a switch. When the user closes the switch the light bulb starts to heat up and emit light. The light bulb stops emitting light and cools down when the switch is being opened.
Since heating up and cooling down are the same animation just run in opposite directions, then only one movie clip will be enough.
I want the light bulb to start heating up when the switch is closed; and start running backward when the switch is open.
Two simple commands, changing direction of playing and controlling a movie clip from another movie clip, that I had never learned how to use properly in Flash™5.

I would like to ask you to help me use both of those commands together.
Thank you