# File: exp4.py
# 
# Simple test of graphics module from textbook
# See documentation in:
#
# http://mcsp.wartburg.edu/zelle/python/graphics/graphics/graphics.html
#
# Drawing white boxes over an orange one is 
# like "erasing" the orange box.
#
# See orange box march across the screen.
#

from graphics import * 
import time

# make a window for drawing stuff
win = GraphWin("Hello", 500, 500)

# initial point
x = 0
y = 240

# Draw first box
box = Rectangle(Point(x,y), Point(x+20,y+20))
box.setFill("orange")
box.setWidth(0)
box.draw(win)

for i in range(10):

   # "erase" previous box
   box = Rectangle(Point(x,y), Point(x+20,y+20))
   box.setFill("white")
   box.setWidth(0)
   box.draw(win)

   # increase x position
   x = x + 20
   
   # draw new box
   box = Rectangle(Point(x,y), Point(x+20,y+20))
   box.setFill("orange")
   box.setWidth(0)
   box.draw(win)

   time.sleep(.5)

# end of for i


# wait before closing window
time.sleep(60)

# make the window go away
win.close()