I need a 5-10min work out to burn fat off my stomach?

Ok so I am 5'4 3/4 and turning 17 in 2 weeks. I weigh 133 at the moment and i keep battling between 134 - 132. I walk home from summer school 4 days a week and its about a mile and a half. I just started. i eat super healthy stuff like tofu apples salad carrots brown rice yogurt, but my weight is up and down and i really wanna get to 125 before the end of the summer. I'm looking for a simple 5-10min work out i can do every day that will speed up my weight loss and get rid of my lower stomach. i use to weigh 160 and im going into my senior year so I really wanna reach my goal. Thank you. :)