# ChapterOO/bike.py
from graphics import *
winW, winH = 400,300
class Bike: #circle c = center , radius, line
      def __init__ (self, c, r): # bCircle bline
            self.bCircle1 = Circle(c,r)
            self.bCircle2 = Circle(Point(c.getX()+ 3*r,c.getY()),r)
            self.bLine = Line(Point(c.getX(),c.getY()),Point(c.getX()+3*r,c.getY()))

      def ddraw(self, win):
            self.bCircle1.draw(win)
            self.bCircle2.draw(win)
            self.bLine.draw(win)
      def mmove(self,dx,dy):
            self.bCircle1.move(dx,dy)
            self.bCircle2.move(dx,dy)
            self.bLine.move(dx,dy)
            
def main():
      win = GraphWin("my balloon",winW,winH)
      b = Bike(Point(10,160),20)
      b.ddraw(win)
      while True:
            b.mmove(0.1,0)
    
main()