Simple flash animation is easy to learn but if you want to make something professional like eye4u.de, then you have to spend a lot of time for learning flash.
For inspiration you can check the portfolio of eye4u.de :
http://www.eye4u.de/unsere_arbeiten/websites/
I like the following flash animation :
http://www.eye4u.de/unsere_arbeiten/...press_swf.html
Note: Don't forget to open the speaker
