Hi, I'm new to Godot, and In the process of of trying to learn it, I'm making the Pong project in the tutorial docs, however, I keep getting a bug. either a) [code]extends Node2D# member variables here, example:# var a=2# var b="textvar"var screen_sizevar pad_sizefunc ready():  screen_size = get_viewport_rect().size  pad_size = get_node("left").get_texture().get_size()  set_process(true)  var ball_speed = 80  var direction = Vector2(-1, 0)  var PAD_SPEED = 150func process(delta):      var ball_pos = get_node("ball").get_pos()      var left_rect = Rect2( get_node("left").get_pos() - pad_size/2, pad_size )      var right_rect = Rect2( get_node("right").get_pos() - pad_size/2, pad_size)      ball_pos += direction ball_speed delta            if ( (ball_pos.y < 0 and direction.y < 0) or (ball_pos.y > screen_size.y and direction.y > 0)):        direction.y = -direction.y              if  ( (left_rect.has_point(ball_pos) and direction.x < 0) or (right_rect.has_point(ball_pos) and direction.x > 0)):        direction.x = -direction.x      ball_speed += 1.1      direction.y = randf() + 2.0 - 1      direction = direction.normalized()      if (ball_pos.x < 0 or ball_pos.x > screen_size.x):        ball_pos = screen_size 0.5 # ball goes to screem center        ball_speed = 80        direction = Vector2(-1, 0)        get_node("ball").set_pos(ball_pos)    # move left pad      var left_pos = get_node("left").get_pos()        if (left_pos.y > 0 and Input.is_action_pressed("left_move_up")):        left_pos.y += -PAD_SPEED delta      if (left_pos.y < screen_size.y and Input.is_action_pressed("left_move_down")):        left_pos.y += PAD_SPEED delta                get_node("left").set_pos(left_pos)                var right_pos = get_node("right").get_pos()        if (right_pos.y > 0 and Input.is_action_pressed("right_move_ip")):            right_pos.y += -PAD_SPEED delta            if (right_pos.y < screen_size.y and Input.is_action_pressed("right_move_down")):              right_pos.y += PAD_SPEED * delta                            get_node("right").set_pos(right_pos)         # Called every time the node is added to the scene.  # Initialization here      pass[/code]Produces. "Parser error, Identifier not found: direction"or b) having PAD_SPEED as a const generates "error parsing expression: misplaced const". anyhelp?

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