1. Lab 18 structure

2. BBall class
instance data: circle direction methods: __init__(self, color, center, dir=1) draw(self,win) move(self, win)

3. main() Part II
set up the window make a ball put the ball in the window move the ball (or move all of the balls)

4. self.circle.getCenter().getY()

5. main() Part IIIA
set up the window make a ball put the ball in the window repeat forever move the ball (or move all of the balls)

6. main() {art IIIC
set up the window make a ball put the ball in the window repeat until q key clicked move all the ball close window

7. main() Part IV
set up the window make a ball put the ball in the window repeat until q key clicked if the mouse was clicked, change bouncyBall's color move all the ball close window

8. to slow things down import time
time.sleep(.03) #pause for 3/100 of a second