Giveaway from me to you!!

So I wanted to wait til I got like around 50 followers to have a giveaway/contest and I think I'll settle for like 25 lol. But I know I want to have it for like halloween time. I seen some cute shit I know you guys would enjoy getting. So pass my blog url around so I can have this giveaway/contest already!!! I still don't know if I want this to be just a giveaway or if I want it to be a contest. If I choose a contest, what kind of contest should it be?