old_contents: from subsystems import Drivetrain
  from time import sleep
  
  # H-drive drivetrain
  drivetrain = Drivetrain()
  
  while (True):
      drivetrain.arcade_drive(1.0, 0.0, 0.0)
  
new_contents: from subsystems import Drivetrain
  from time import sleep
  import sensors
  
  # H-drive drivetrain
  drivetrain = Drivetrain()
  FlameSensor = sensors.FlameSensor(12)#Flame Sensor Using Pin 12
  Flame_LED_Pin = 13#connect LED to pin 13
  while (True):
      FlameSensor.is_flame_detected_LED(13)
      drivetrain.arcade_drive(1.0, 0.0, 0.0)
      time.sleep(.1)
  
subject: Update firefighter.py