This is a simple modular origami project consisting of 8 sticky notes, but it can be done with any kind of paper.
Step 1: Fold Your Stick Note in Half
Fold the stick note in half vertically
Step 2: Fold the Top Corners in to the Center
Step 3: Fold in Half, Push the Back Towards the Center and Crease
Step 4: Repeat Steps 1-3 Another 7 Times
Make a total of 8.
Step 5: Place the Front End of One Between the Back Flaps of Another
Step 6: Fold the Extended Corners Into the Top
Step 7: Repeat Steps 5 and 6 Until Only One Piece Remains
Step 8: Carefully Attach the Last Piece
It won't fit quite right, so you will have to bend the entire shape to fit them together, but do the exact same procedure as with earlier.
Step 9: Finished Folding
You will end up with something like this.
Step 10: Transform
Push the edges in carefully two sides at a time, and get closer until there is no gap in the middle.