from machine import Pin
import time

button 1=Pin (18, Pin.IN, Pin.PULL UP)
button 2=Pin (33, Pin.IN, Pin.PULL UP)

def stopwatch ():
    minute=0
    start=time.ticks ms()
    while True:
           C= button 2.value()
           time.sleep(0.01)
           D= button 2.value()
           if C and not D:
                  break
           elif not C and D:
               pass
           end=time.ticks ms()
           second=time.ticks diff(end,start)
           time.sleep ms()
           if second > 59999:
               minute += 1
               start=time.ticks ms()
               
     display=start(minute)+":"+start(second/1000)
            print(display)
while True
      A = button 1.value()
      time.sleep(0.01)
      B = button 1.value()
      if A and not B:
          stopwatch
      elif not A and B:
          pass