|Step 15: Like Step 11, open, squash, and fold the left side.|
|Step 16: Like Step 12, fold the top and bottom corners to the center.|
|Step 17: Like Step 13, fold the right corner to the center.|
|Step 18: Like Step 14, fold the right half over to the left.|
|Step 19: Diagonally fold back both bottom corners to form the shape of the bottom of a heart.|
|Step 20: Fold back the top outter corners of the heart.|
|Step 21: Now fold back the top inner corners of the heart of complete the heart shape.|
|Step 22: Go ahead and write a message inside the secret heart and if you like, use sticker to tape the heart shut.
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