code: def execute(self, controller_id, command, *args, **kwargs):
          
          controller_instance = self.controllers[controller_id]
          controller_instance.last_command_at = self.last_command_at
          ret_val = getattr(controller_instance, command)(*args, **kwargs)
          self.last_command_at = controller_instance.last_command_at
          return ret_val
docs: Execute a single command, and sets sleep times properly.
  
          - controller_id = index of controller, zero-based
          - command is normal LedController command as a string
          - *args and **kwargs are passed to command
  
          For example, .execute(0, "on", 1) sends "on" command to group 1 on controller 0 (first IP passed to constructor).