Insert ten cents at time 15
Insert ten cents at time 25
Insert fifty cents at time 35
Dispensing gum at time 45
Press money back button at time 45
Dispensing ten cents at time 55
Dispensing ten cents at time 65
Insert ten cents at time 75
Press money back button at time 85
Dispensing ten cents at time 95
Testbench finished at time 115