#file week10/carBounce.py
from graphics import *
import time
def main():
      winW,winH = 500,300
      win = GraphWin("Moving car",winW,winH)
      xstart,ystart = 100,100
      carW,carH = 90,50
      r = Rectangle(Point(xstart,ystart),Point(xstart+carW,ystart+carH)) 
      r.setFill("purple")
      line = Line(Point(0,ystart+carH),Point(winW,ystart+carH))
      r.draw(win)
      line.draw(win)
      speed = 1 # 1  from left to right -1 for right to left
      while True:
            r.move(speed * 5,0) # dx = 5 dy = 0
            time.sleep(0.01)
            if ( r.getP1().getX()+carW > winW or r.getP1().getX() < 0): 
              speed = speed * -1

main()