Step 1: Things You Need
Post It's (or some kind of bright paper)
Step 2: Getting Started
Then rub the finger you want to "print" hard on the post it until its all black.
Step 3: Lifting the Print
After that you just put it on the paper and there you go.
On this fingerprint i used i bad pen or something so it wasn't so great.
Step 4: The Result
If you want you can make two of each finger and see if you can compare them together.