Chess with Tessa

Today I played chess with Tessa, and we used a chess clock.

You set the chess clock for five minutes on each side. There is a stop-and-start button. Press the start button. One side of the clock the seconds start ticking. Forty-nine... forty-eight... forty-seven...
There is a sort of flip button on the top. Once you have made your move, flip your side of the flip button. The other side starts ticking. Forty-nine... forty-eight... forty-seven...! 
Once a person's five minutes runs out, the other person has won!
I won, by a few minutes, but because I just move pawns real quick, not even thinking about it, so I usually end up with, like, two players left! But Tessa was better. She should have won.