I need to make a movie clip flip when moving a different way. Is there such a code to do this?I don't want to have double sprites for everything.

Probably, you'd know if you read the documentation.

there's probably a better way to do it than this, but off the top of my head the fastest way to go about it would be something along the lines of
if (yourObjectsXSpeed < 1) {
yourObject.xScale = -1;

like i said in the other thread, this isn't the exact syntax or correct function names because it's been ages since I've used AS2, but that's essentially how you'd go about it.

I do not want to have a double sprite for everything. So, I need to know if there is a code that will help me make a movie clip flip while moving a different way.