[Kingofl337]

In operator control you should do a infinte loop and thats it. The rest of the time any loops are optional. If you break out of the infinite loop in operator control the robot will just stop moving.

People like using timers in autonomous mode or ending the auto program once the sequnce has been completed. This is what Neil did in the code your are talking about. If you set done = 1 then code would end. Because ! = not so
while( !done) means while ( (not)done).