15.
Open the pocket a little.
Prepare to apply a mountain-fold to the front-most two layers and a valley-fold to the back-most two layers.
16.
Start applying both a mountain-fold and a valley-fold of the step #15.
I wrote your name in the sky, but the wind blew it away. I wrote your name in the sand, but the waves washed it away. I wrote your name in my heart, and forever it will stay.