Sleep…

So I'm trying to sleep but I can't, so I get out of bed and aimlessly wander around the house for half an hour; eventually I found myself drawn to the eerie glow of my laptop screen I forgot to turn off. For some reason I fired up OOo and started doodling this diagram, then went to pour a glass of water…

This diagram made sense when I made it half an hour ago in a tired, dazed stupor, but looking back at it now just before I head off to bed again I can't make sense of it. Oh well, night night.