def animate_contraction(g, e, frames = 12, **kwds):

def animate_vertex_deletion(g, v, frames = 12, **kwds):

def animate_edge_deletion(g, e, frames = 12, **kwds):

def animate_glide(g, pos1, pos2, frames = 12, **kwds):

def medio(p1, p2):

def new_color():

def animate_minor(g, m, frames = 12, pause = 50, step_time = 100):