Tutorial for Flash CS4 and up. Made in Flash CC. Not made for people with zero Flash experience.
Looping, scrolling backgrounds and nightmares of seeing the same cactus every .04 seconds.

Dang Tutorials:
http://www.youtube.com/playlist?list=PLYDh8mMwv-pMt7hSDeLY1X0XyVRiCwKGj