Переключение фона окна кнопками RadioButton

import tkinter
from tkinter import *
root = Tk() 
canvas = tkinter.Canvas(root, width=800, height=300)
def change():
    global root
    global canvas
    if var.get() == 0:
        label['bg'] = 'red'
    elif var.get() == 1:
        label['bg'] = 'green'
    elif var.get() == 2:
        label['bg'] = 'blue'
    elif var.get() == 3:
        label['picture/fon/фон.jpg']
    elif var.get() == 4:
        label['picture/fon/фон2.jpg']
    elif var.get() == 5:
        label['picture/fon/bambuk.jpg']
    elif var.get() == 6:
        label['picture/fon/karton.jpg']
    elif var.get() == 7:
        label['picture/fon/pirgament.jpg']
    elif var.get() == 8:
        label['picture/fon/pirgament1.jpg']       
    elif var.get() == 9:
        label['picture/fon/pirgament2.jpg']
    elif var.get() == 10:
        label['picture/fon/tkan1.jpg']     
    elif var.get() == 11:
        label['picture/fon/tkan2.jpg']
    elif var.get() == 12:
        label['picture/fon/wood1.jpg'] 
    elif var.get() == 13:
        label['picture/fon/wood2.jpg']
    elif var.get() == 14:
        label['picture/fon/wood3.jpg']    
    elif var.get() == 15:
        label['picture/fon/wood4.jpg']     
 
 
var = IntVar()
var.set(0)
red = Radiobutton(text="Красный фон",
                  variable=var, value=0)
green = Radiobutton(text="Зелёный фон",
                    variable=var, value=1)
blue = Radiobutton(text="Голубой фон",
                   variable=var, value=2)
fon = Radiobutton(text="Первый фон",
                  variable=var, value=3)
fon2 = Radiobutton(text="Второй фон",
                    variable=var, value=4)
bambuk = Radiobutton(text="Бамбук фон",
                   variable=var, value=5)
karton = Radiobutton(text="Картон фон",
                  variable=var, value=6)
pirgament3 = Radiobutton(text="Пиргамент№1 фон",
                    variable=var, value=7)
pirgament1 = Radiobutton(text="Пиргамент№2 фон",
                   variable=var, value=8)
pirgament2 = Radiobutton(text="Пиргамент№3 фон",
                  variable=var, value=9)
tkan1 = Radiobutton(text="Ткань№1 фон",
                    variable=var, value=10)
tkan2 = Radiobutton(text="Ткань№2 фон",
                   variable=var, value=11)
wood1 = Radiobutton(text="Дерево№1 фон",
                  variable=var, value=12)
wood2 = Radiobutton(text="Дерево№2 фон",
                    variable=var, value=13)
wood3 = Radiobutton(text="Дерево№3 фон",
                   variable=var, value=14)
wood4 = Radiobutton(text="Дерево№4 фон",
                  variable=var, value=15)
 
button = Button(text="Изменить",
                command=change)
label = Label(width=20, height=10)
red.grid()
green.grid()
blue.grid()
fon.grid()
fon2.grid()
bambuk.grid()
karton.grid()
pirgament3.grid()
pirgament1.grid()
pirgament2.grid()
tkan1.grid()
tkan2.grid()
wood1.grid()
wood2.grid()
wood3.grid()
wood4.grid()
button.grid()
label.grid()
 
root.mainloop()

label['bg'] = 'red'
...
label['picture/fon/фон.jpg']

label['picture/fon/фон.jpg']

img = ImageTk.PhotoImage(Image.open('picture/fon/фон.jpg'))
label['image'] = img