Desenhando gifs em python

gif.py

#!/usr/bin/env python

"""
Antes de executar esse programa você deve instalar as dependencias:
    [user@pc]~ $ pip install --user moviepy gizeh
Então execute 
    [user@pc]~ $ python gif.py
Irá gerar dois gifs: "a.git", "b.gif".
"""


from moviepy.editor import VideoClip
import gizeh

s = gizeh.Surface(500,500)
def sem_apagar(t):
    p = gizeh.circle(r=10, fill=(1,1,1), xy=(t*50,t*50))
    p.draw(s)
    return s.get_npimage()

def apagando(t):
    s = gizeh.Surface(500, 500)
    p = gizeh.circle(r=10, fill=(1,1,1), xy=(t*50,t*50))
    p.draw(s)
    return s.get_npimage()

a = VideoClip(sem_apagar, duration=10)
b = VideoClip(apagando, duration=10)

a.write_gif("a.gif", fps=3)
b.write_gif("b.gif", fps=3)