human
Solve the following python programming problem given the following code:
def __init__(self) : 
    super (TestLayer, self).__init__ () 
    (x, y) = director.get_window_size () 
    self.sprite = Sprite ('grossini.png', ((x // 2), (y // 2))) 
    self.sprite2 = Sprite ('grossini.png', ((x // 4), (y // 2))) 
    self.add (rem.sprite) 
    self.add (self.sprite2, name = 'grossini') 
    def rem() : 
        self.remove (self.sprite) 
        self.remove ('grossini') 
self.do ((Delay (5) + CallFunc (rem))) 

    
    

    Fix the buggy line: self.add (rem.sprite)
assistant
#Here is Python code to fix the buggy line: self.

self.add (self.sprite)