Tell the timer to go to count down or stopwatch mode. If the timer is in countdown mode you have to tell it how many hours, minutes, and seconds to set itself for. Then press that start button to start the timer. If you tell it to go to stopwatch mode all you have to do is tell it to start and press the red button when you want it to stop.
In countdown mode if you set the minutes or seconds to a number greater than 60 the timer automatically sets the minutes and/or seconds to the correct number that is less than 60 no mater how big the number is. In stopwatch mode when you press the red button tenth seconds sometimes stops at 10, and seconds and minutes sometimes stop at 60... just ignore that if that happens. _______________________________________________________*It's surprisingly hard to make a stopwatch. At first i thought it would be very easy, but then i couldn't figure out why a glitch was happening until i rearranged the code. XD