ok I got this old computer to mess with, it was a Tandy, and it had a 720k floppy drive! looked inside, interesting, now I boot it up, it say MSdos 4.0 and then whoa and behold a Bible verse comes up and stays up for 5 seconds then continues with The tandy UI.
and the bible verses are random.

So How is dos able to do this? How Does it get a program to run for 5 seconds? then continues??????

Can you tell me?