from tkinter import *
window = Tk()

window.title("Canvas Animation")

x = 10
y = 10
a = 50
b = 50
x2 = 10
y2 = 10
c = 50
d = 50

x_vel = 8
y_vel = 8
x2_vel = 10
y2_vel = 10

def move():
    global x
    global y
    global a
    global b
    global x_vel
    global y_vel
    if x < 10:
        x_vel = 8
    if x > 350:
        x_vel = -8
    if y < 10:
        y_vel = 8
    if y > 150:
        y_vel = -8
    canvas.move(circle, x_vel, y_vel)
    coordinates = canvas.coords(circle)
    x = coordinates[0]
    y = coordinates[1]
    window.after(33, move)

def move2():
    global x2
    global y2
    global c
    global d
    global x2_vel
    global y2_vel
    if x2 < 50:
        x2_vel = 10
    if x2 > 300:
        x2_vel = -10
    if y2 < 50:
        y2_vel = 10
    if y2 > 100:
        y2_vel = -10
    canvas.move(circle2, x2_vel, y2_vel)
    coordinates = canvas.coords(circle2)
    x2 = coordinates[0]
    y2 = coordinates[1]
    window.after(33, move2)

canvas = Canvas(window, height=200, width=400, bg="#ffc929")
canvas.grid(row=0, column=0)

coord = [x, y, a, b]
circle = canvas.create_oval(coord, outline="#ffe100", fill="#ffe100")
coord2 = [x2, y2, c, d]
circle2 = canvas.create_oval(coord2, outline="#ffa200", fill="#ffa200")

move()
move2()

window.mainloop()