I'll try and make this simple.
White walls + no permission to paint them = blah.
Taking long strips of wrapping paper, I made "wallpaper."
Imagine this in a dorm. There are so many possible variations.
DIY Striped Wallpaper Steps:
1. Bought four rolls (2 pink, 2 silver) of these Martha Stewart paper rolls. They are basically long strips of wrapping paper. You can cut wrapping paper into strips to achieve the exact same thing. I bought these on clearance at Marshall's for $0.70/roll. So bargain.
3. Attached strips of paper onto wall with sticky-tac. To make the striped "wallpaper" look, I held the strips up to where the wall meets the ceiling, sticky-tacked that end, then cut the bottom where the wall meets the floor and sticky-tacked that end. So you're just eyeballin' it, yo. Not difficult.
This was the semi-before:
Back to the now: