ball_pos=[WIDTH/2,HEIGHT/2]
ball_vel=[6,5]


def move_ball():
    global ball_vel,vel



def draw(canvas):
    ball_pos[0] +=ball_vel[0]
    ball_pos[1] +=ball_vel[1]
    if ball_pos[0] <= BALL_Radius:
        ball_vel[0] *= -1
    if ball_pos[0] >= WIDTH - BALL_Radius - 1:
        ball_vel[0]*=-1
    if ball_pos[1] <= BALL_Radius or ball_pos[1] >= HEIGHT - BALL_Radius - 1:
        ball_vel[1] *= -1
    canvas.draw_circle(ball_pos, BALL_Radius, 2, "Red", "Red")
def keydown(key):
    global paddle1_vel, paddle2_vel

def keyup(key):
    global paddle1_vel, paddle2_vel

frame = simplegui.create_frame("Pong", WIDTH, HEIGHT)
frame.set_draw_handler(draw)
frame.set_canvas_background('White')



frame.start()