old_contents: import robocup
  import constants
  import play
  import enum
  import behavior
  import main
  
  
  # Maintains the state of the ball's position by keeping track of which
  # half the ball is on and prints on both entering a given state and
  # continously during the execution of a given state.
  class SkillsPractice(play.Play):
      class State(enum.Enum):
          # Define your states here.
          # eg: some_state = 0
          # -----------------------
  
      def __init__(self):
          super().__init__(continuous=True)
  
          # Register the states you defined using 'add_state'.
          # eg: self.add_state(WhichHalf.State.<???>,
          #                    behavior.Behavior.State.running)
          # ----------------------------------------------------
  
          self.add_transition(
              behavior.Behavior.State.start, behavior.Behavior.State.running, 
              lambda: True,
              "immediately")
  
          self.add_transition(
              behavior.Behavior.State.running, behavior.Behavior.State.completed
              lambda:self.subbehavior_with_name("skill").state == behavior.Behavior.State.completed,
              "done with behavior")
  
          # Add your state transitions using 'add_transition'.
          # eg: self.add_transition(behavior.Behavior.State.start,
          #                         self.State.<???>, lambda: True,
          #                         'immediately')
          # eg: self.add_transition(self.State.<???>, self.State.<???>,
          #                         lambda: <???>,
          #                         'state change message')
          # ------------------------------------------------------------
  
      # Define your own 'on_enter' and 'execute' functions here.
      # eg: def on_enter_<???>(self):
      #         print('Something?')
      # eg: def execute_<???>(self):
      #         print('Something?')
      # ---------------------------------------------------------
  
      def on_enter_running(self):
          # To make a robot move, use skills.move.Move(<point to move to>)
          # To create a point, we initialize a point using 
          # robocup.Point(<x coordinate>, <y coordinate>)
          
          # This line moves a robot to the point (0, 0)
          move_point = robocup.Point(0, 0)
          skill = skills.move.Move(move_point)
  
          # Adds behavior to our behavior tree, we will explain this more later
          self.add_subbehavior(move_skill, "skill", required=True)
new_contents: import robocup
  import constants
  import play
  import skills
  
  # This is a file where you can learn how skills work!
  class SkillsPractice(play.Play):
  
      def __init__(self):
          super().__init__(continuous=True)
  
          # To make a robot move, use skills.move.Move(<point to move to>)
          # To create a point, we initialize a point using 
          # robocup.Point(<x coordinate>, <y coordinate>)
          
          # This line moves a robot to the point (0, 0)
          move_point = robocup.Point(3, 9)
          skill = skills.move.Move(move_point)
  
          # Adds behavior to our behavior tree, we will explain this more later
          self.add_subbehavior(skill, "skill", required=True)
subject: Remove unnecessary code