Okay I'm not sure how well this will work with tights but a pair of cheap spandex/(possibly regular cotton) leggings from forever21 will work fab.
First step is putting on the tights. Make sure you have an idea of what pattern you want to cut into these. This is one of those, if you mess up there's really no easy fix (I guess you could hand sew it but that's just super time consuming).
YOU NEED A SUPER SHARP PAIR OF SHEARS!
Cut away starting at the top of your leg/thigh and go down! Careful to not cut yourself. When you're finished with the front take them off and put them on backwards so you can get the same pattern on the front and the back (if that's what you want).
Wear them out and you're sure to get some attention and compliments!
(girl on the left best example)
Courtesy of fashiongonerogue