from graphics import *



def Main():


    valid = False
    while not valid:

        sizeInput= eval(input("PLease select a size, 7, 9, 11: "))
        if sizeInput == 7 or sizeInput == 9 or sizeInput == 11 :
            size= sizeInput*100
            valid=True

        else:
            print("Invalid Number")

    Draw(size)

def Draw(size):
    win = GraphWin("Pat1",size,size)
    PointX= Point(0,0)
    PointY= Point(700,70)

    line = Line(PointX,PointY)
    i = 0
    while i<10:
        line.draw(win)
        PointX.x+70
        PointY.y+70
        i=i+1

`