# Move to Center

Written by Chris Piech. Academy Award worthy?

## Solution

import tkinter
import time

CANVAS_WIDTH = 600      # Width of drawing canvas in pixels
CANVAS_HEIGHT = 600     # Height of drawing canvas in pixels
SQUARE_SIZE = 70

def main():
canvas = make_canvas(CANVAS_WIDTH, CANVAS_HEIGHT, 'Move Square')
# make the rectangle...
start_y = CANVAS_HEIGHT / 2 - SQUARE_SIZE / 2
end_y = start_y + SQUARE_SIZE
rect = canvas.create_rectangle(0, start_y, SQUARE_SIZE, end_y, fill='black')

# animation loop
while not is_past_middle(canvas, rect):
# update the world
canvas.move(rect, 1, 0)
canvas.update()

# pause
time.sleep(1/50.) #parameter is seconds to pause.
canvas.mainloop()

def is_past_middle(canvas, rect):
max_x = CANVAS_WIDTH / 2 - SQUARE_SIZE / 2
curr_x = get_left_x(canvas, rect)
return curr_x > max_x

######## These helper methods use "lists" ###########
### Which is a concept you will learn Monday ###########

def get_left_x(canvas, shape):
# returns the x location of the shape
return canvas.coords(shape)[0]

def get_top_y(canvas, shape):
# returns the y location of the shape
return canvas.coords(shape)[1]

######## DO NOT MODIFY ANY CODE BELOW THIS LINE ###########

# This function is provided to you and should not be modified.
# It creates a window that contains a drawing canvas that you
# will use to make your drawings.
def make_canvas(width, height, title):
"""
DO NOT MODIFY
Creates and returns a drawing canvas
of the given int size with a blue border,
return canvas