Poetry Contest!!

Okay, so my school has a poetry contest going on and the winner of said contest win 500 in cash. My problem is, should i enter a poem i have already done, or make a new one. For you people who actually read this, i have some of my poems in my poem world, so if you go read some of them and have one poem that you really like, let me know! Depending on if aanyone voices their thoughts on the best way to go about this, either choosing a poem I've already done or making a new one, i will do the one that is most popular.