Take each cookie out and take the zester and file down each square side to round to resemble a band-aid.
Lay the filed cookies out on a cookie sheet or tray.
Take White icing and put in the shape of a square in the middle of the wafer cookie.
Then take a spoon full of your raspberry preserves and section off with a tooth pick a small glob, resembling (sounds gross I know) coagulated blood
Repeat until all cookies are done on a tray.
Video
Notes
Try this fun display hack...When all cookies are done add them all to a tray with a box of band-aids near by to add to the bloody band-aid effect. Also take a few band-aids out to display. These will for sure be the talk of the party!