Here's what it looked like after printing and posting them up
Then I decided to get yellow duct tape, write "caution" on it and string it along the window. Of course, it sticks really well to itself and not the window.

Here's the end product. Tied the "tape" to the curtain frame instead of tape. It wasn't until I opened the packaging that I realized it said "caution, do not enter" instead of just "cauation." .......................Eh, it still works. Also put up a Midnight Riders print out on my bedroom window.