import tkinter

okno = tkinter.Canvas()
okno.pack()

okno.create_rectangle(50,50,200,150,outline="white",fill="white")
okno.create_arc(95,70,155,130, start=0, extent=180, fill="red", outline="red")
okno.create_rectangle(50,100,200,150,outline="red",fill="red")
okno.create_arc(95,70,155,130, start=0, extent=-180, fill="white", outline="white")
okno.update()