Thank for  your comment. Maybe i will update it later, because im working on much bigger project now.

PS: your idea is much better

You Improved yourself so far with every piece =)

a work with a low color count like this could look really benefit from clear forms and antialiasing. You could also use your middle value for shading or adding farther away seeming parts.

I played a bit with the upper part to show you a possible direction for further improvement

http://www.abload.de/img/darnok_cloudsvjrn0.gif