from machine import Pin, Timer

# Create tuple of the seven segment cathodes.
segs = (Pin('GP0',Pin.OUT), Pin('GP2',Pin.OUT), Pin('GP13',Pin.OUT), Pin('GP14',Pin.OUT),
        Pin('GP15',Pin.OUT), Pin('GP1',Pin.OUT), Pin('GP12',Pin.OUT))
# Seven Segment Anodes.
digits = (Pin('GP3', Pin.OUT), Pin('GP4', Pin.OUT), Pin('GP5', Pin.OUT), Pin('GP11', Pin.OUT))

codes = [(0,0,0,0,0,0,1), (1,0,0,1,1,1,1), (0,0,1,0,0,1,0), (0,0,0,0,1,1,0),
         (1,0,0,1,1,0,0), (0,1,0,0,1,0,0), (0,1,0,0,0,0,0), (0,0,0,1,1,1,1),
         (0,0,0,0,0,0,0), (0,0,0,0,1,0,0)]

counter = [0, 1, 2, 3]

def numberCounter(timer):
   global counter
   for i in range(4):
      if counter[i] < 9:
         counter[i] = counter[i] + 1
      else:
         counter[i] = 0

digitCount = 0
def updateDisplay(timer):
   global digitCount
   digits[digitCount].off()
   if digitCount < 3:
       digitCount = digitCount + 1
   else:
      digitCount = 0
   for i in range(7):
      segs[i].value(codes[counter[digitCount]][i])
   digits[digitCount].on()


tmr1 = Timer(period = 1000, callback=numberCounter)
tmr2 = Timer(freq = 100, callback=updateDisplay)