Do this repeatedly and crease the fold each time. After 3 or 4 folds the paper should tear along the fold line.
The rectangle at the bottom of the piece of paper needs to be discarded.
How to make fortune teller out of paper. To fold a fortune teller take a square piece of paper and fold it in half diagonally so it makes a triangle then crease the fold. Unfold the paper then fold it again diagonally the other way and crease that fold. There are two ways to get rid of this.
Fold along where the folded down portion of paper and the rectangle meet.