Machine

I sleep in 4 hour cycles,to the minute.I could set my clocks, it is that exact.If I sleep at 10,11,12 I will wake up exactly 4 hours later. Can't sleep with the air con on,too cold,but I wake up too hot and have to cool the room down again.Once cooled down I begin my second 4hours,which again will be spot on 4 hours(unless interrupted by my alarm clock).I think I must have been replaced by a machine.