Im trying to make something occur every 1/2 second interval with this code:

def doorcheck(self):
    global time_digit, fredpos
    
    current_time = millis()
    current_timestring = str(current_time)
    if time_digit == 5 or time_digit == 0:
      print("yis")
      if fredpos==4:
        fredpos=0  
        frDoorCheck=1
        self.x = self.posX[self.i]
        self.y = self.posY[self.i]
    print(time_digit)
    if current_time > 0 and current_time < 1000:
     time_digit = current_timestring[0]
    if current_time > 999 and current_time < 10000:
     time_digit = current_timestring[1]
    if current_time > 9999 and current_time < 100000:
     time_digit = current_timestring[2]
    if current_time > 99999 and current_time < 1000000:
     time_digit = current_timestring[3]
    if time_digit == 5 or time_digit == 0:
      print("yis")
      if fredpos==4:
        fredpos=0  
        frDoorCheck=1
        self.x = self.posX[self.i]
        self.y = self.posY[self.i]

I have printed the time_digit variable to make sure its reaching 5 or 0, but even when it does it is not printing “yis” despite being in the code TWICE to do so

What I want to happen is for the if statement at the top and bottom to reign true, and while it is several times being true, it refuses to show as true