I want a 3d animation but the plot is not showing any points

My code thus far:

import matplotlib.pyplot as plt
from matplotlib.animation import FuncAnimation

fig = plt.figure()
ax = fig.add_subplot(111, projection='3d')

points = [[1,1,1], [5,5,5], [10,10,10], [15,15,15]]

scatter = ax.scatter([], [], [])
ax.set_xlim(-20, 20)
ax.set_ylim(-20, 20)
ax.set_zlim(-20, 20)

def updateFrame(frame):
    x_data, y_data, z_data = zip(*points[:frame+1])
    scatter._offset3d = (x_data, y_data, z_data)
    return scatter,

ani = FuncAnimation(fig, updateFrame, frames=len(points), interval=1000, blit=False)

ax.set_xlabel('x')
ax.set_ylabel('y')
ax.set_zlabel('z')
plt.show()