How to add a scroll bar
canvas = tk.Canvas(parent, width=150, height=150)
canvas.create_oval(10, 10, 20, 20, fill="red")
canvas.create_oval(200, 200, 220, 220, fill="blue")
canvas.grid(row=0, column=0)
scroll_x = tk.Scrollbar(parent, orient="horizontal", command=canvas.xview)
scroll_x.grid(row=1, column=0, sticky="ew")
scroll_y = tk.Scrollbar(parent, orient="vertical", command=canvas.yview)
scroll_y.grid(row=0, column=1, sticky="ns")
canvas.configure(yscrollcommand=scroll_y.set, xscrollcommand=scroll_x.set)