Any ideas for my party? I don't really have a theme or anything?

Okay so I'm graduating 7 months early and my graduation day falls right about the time of my 17th birthday so I wanted to have a birthday/graduation party. I planned it for 3 weeks from now and sent an invite to 35 people. The party consists of teens (12 people-close friends) ages 16-19, adults (18 people -aunts, uncles, grandparents, and close friends) ages 35-70, and kids (5 people-cousins and sisters) ages 6-13. The party goes from 6 PM - 11 PM on a friday night, and after everyone goes home about 8 of my closest friends are staying the night. That's basically the plan. I don't really have a theme of a plan for the party so I wanted some ideas. I was thinking of putting up a big board where all my friends and family can write messages and stuff. I also wanted to put up pictures on a wall of me each year at age 1, age 2, age 3 and so on. My favorite color is green, so maybe a green color scheme as a theme - i don't know. I also like purple and blue. I like sushi and itallian food, but I don't know which to chose, maybe both. My ideas are really scattered and any input, idea or suggestion would be greatly appreciated! Thanks!