Need Help Quick

Okay story is I need to have a project in scratch due next week, making the project shouldn't be to much of an issue but I really have no idea's at all.
So if you have any idea's or any experience with scratch and could help me out, please send me a pm.
Thanks

 

What kind of project?

 

make a leekspin.

 

Make a catapult.

 

The project can be on anything and how would you go about making a catapult?

 

I don't know do something about airplane wings or some crap, I did it once for a science project, pretty easy.