data = np.random.randint(5,10,8)
fig, ax = plt.subplots()
ax.axis('off')
n = 3
nx = len(data)
ax.bar(n,data[n], color='#aa3333')
ax.set_xlim(0,nx)
ax.set_ylim(0,int(data.max())+1)
plt.xkcd()
axkcd = ax.twinx()
axkcd.set_xlim(ax.get_xlim())
axkcd.set_ylim(ax.get_ylim())
axkcd.set_frame_on(True)
axkcd.patch.set_visible(False)
plt.setp(axkcd.spines.values(), visible=True)
axkcd.bar(np.arange(n), data[:n], color='#aaaaaa')
axkcd.bar(np.arange(n+1,nx), data[n+1:], color='#aaaaaa')
<Container object of 4 artists>