How can i get loose curls for my graduation tonight?

If you use the straightener, you can straighten a piece of hair at an able and drag the flat iron down, like you were curling ribbon with scissors. Then while the hair is warm, wrap it around two or three fingers in a circle, all the way up to your scalp, and pin it with a Bobby pin or short clip. Leave them on for a while and when you take the pins down you'll have loose curls. Roll the hair tightly or loosely before you pin, depending on how you want the curls to look. There are plenty of pin curl tutorials on YouTube as well. Congrats!