Simple Game Character Display

This tutorial is about how to show a character moving when the arrow keys are pressed, and how he stops moving but still faces that direction once that arrow key is let up. However, there are still a few problems with it. Like if two keys are pressed at once. Oh well.

Let's get this party started...
You need to have the following things already:

1. A MovieClip (MC) of the character walking and stading, facing up.
2. An MC of the character walking and standing facing down.
3. An MC of the character walking and standing facing left.
4. An MC of the character walking and standing facing right.
5. Basic knowledge of Flash MX and actionscripting.
6. A background (optional).