The Game

A mostly difficult day! 
Rosh must have sensed it and dropped by to let me in on a secret game she played when at uni. 
Now, I'm addicted! ;)
But, how can you play the game when you've lost the plot?! 
Need to think fast! :)

https://en.wikipedia.org/wiki/The_Game_(mind_game)#/media/File:I_lost_the_game.jpg