In the imagined future, robots rised against humans and rapidly begun to win the humankind. One of the genius inventors invented a time machine. That time machine could not move a matter in time. It could only change the state of particles (i. e. electrons).
So, the inventor contacted himself in the past using that time machine and instant messenger that he used in the past. (He modified the bits in memory of messaging servers.) He managed to do this just few minutes before robots capture his office and kill him.
What could the inventor tell himself in the past in order to save his life?