practice creates art..
Good that you make an attemp to make music but a few guidelines would help you forward I think...
Its a loop, and a loop (even if its 6 seconds) should kept the intrest of the listener for more then a minute (keep in mind that it could be used in a game) the overall idea of the Audio Portal(AP) on Newgrounds(NG) is that other creative people who create flash movies, can use royalty free music. To be honoust, I am afraid that this is not going to be used in any movie... Keep on trying, practice and learn how to use the tools, but for your own sake... do not upload this kinda stuff before admins will ban your account for uploading spam... Please do not feel offended, I just give you some nifty advice.