## Change_Starting_Direction.py

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## Code Snippet

``````#note - an ERROR may be caused as Python is complaining about breaking out of the while loop when the window is closed - you can ignore that for now (or a fix is provied in the solutions section for those who are interested"""
"""
==========Task===============

"""

from tkinter import *
import random
import time

class Ball:
def __init__(self,canvas,color):
self.canvas=canvas
self.id=canvas.create_oval(30,30,50,50,fill=color)
self.canvas.move(self.id,100,200)

#ADD THESE LINES TO OUR __INIT__ METHOD
starting_position=[-3,-2,-1,1,2,3] #create a list with various possible starting positions
random.shuffle(starting_position) #mix them up with the random shuffle function
self.x = starting_position[0] #set the value of x to the first item in the list - this means x can be any value in the list from -3 to 3
self.y = -3 #changing y to -3 will simply increase the rate at which it moves along y (increases the speed)
self.canvas_height=self.canvas.winfo_height() #set the canvas height by calling the canvas function winfo_height (it gives us the current canvas height)

def draw(self):
self.canvas.move(self.id,self.x,self.y)
pos=self.canvas.coords(self.id)

if pos[1] <=0:
self.y=1
if pos[3] >=self.canvas_height:
self.y=-1

def main():
tk=Tk()
tk.title("My 21st Century Pong Game")
tk.resizable(0,0)
tk.wm_attributes("-topmost",1)
canvas=Canvas(tk,bg="white",width=500,height=400,bd=0,highlightthickness=0)
canvas.pack()
tk.update()

ball1=Ball(canvas,'green')
while 1:
tk.update()
ball1.draw() #call the ball draw method here
time.sleep(0.01)
main()

``````