It's based on math of today's date. 6/24/2015. Take any part of that and fins a snippet of your WIP. I am going to use the day 24: 2 + 4 + 1 = 7 lines. One extra line for luck.
I turned, “Don’t worry, Callie. It’s only just past the Elms Gate.” I pointed back towards the elm trees. “Once there, I can tell you. I promise.” I turned my body and taking a step over a small downed pine tree. I fell farther than I intended, feeling like the world was falling around me.