15.
Unfold and draw a line on the crease.
Prepare for a valley-fold along the red dash-lines.
16.
Valley-fold according to the step #15.
This is the same as the step #4.
Heart! We will forget him! You and I -- tonight! You may forget the warmth he gave -- I will forget the light! When you have done, pray tell me That I may straight begin! Haste! lest while you're lagging I remember him!