import matplotlib.pyplot as plt
import matplotlib.animation as animation

MAX_FRAMES = 50

xs, ys = [], []
obj = None

def update(frame_number):
  xs.append(frame_number)
  ys.append(frame_number)
  obj.set_data(xs, ys)

fig = plt.figure()

ax = plt.axes()
ax.set_ylim(-1, 100)
ax.set_xlim(-1, 100)

obj, = plt.plot([], [], 'ro')

anim = animation.FuncAnimation(
    fig, update, MAX_FRAMES, interval=100, repeat=False)

plt.show()