Building a screen saver

We will start by building a screen saver. The program will consist of several random-colored and random-sized balls bouncing all over the screen at random velocity, as shown in the following screenshot:

Let's create a class to generate balls with random attributes. Accordingly, we define a new class named RandomBall. 7.01_screensaver.py:

class RandomBall:

    def __init__(self, canvas):
        self.canvas = canvas
        self.screen_width = canvas.winfo_screenwidth()
        self.screen_height = canvas.winfo_screenheight()
        self.create_ball()
        
    def create_ball(self):
        self.generate_random_attributes()
        self.create_oval()    

    def generate_random_attributes(self):
        self.radius = r = randint(40, 70)
        self.x_coordinate = randint(r, self.screen_width - r)
        self.y_coordinate = randint(r, self.screen_height - r)
        self.x_velocity = randint(6, 12)
        self.y_velocity = randint(6, 12)
        self.color ...