In [27]:

    

from matplotlib import pyplot as plt
import numpy as np

plt.xkcd()

fig = plt.figure()
ax = fig.add_subplot(1, 1, 1)
ax.spines['right'].set_color('none')
ax.spines['top'].set_color('none')
plt.xticks([])
plt.yticks([])
ax.set_ylim([-20, 10])

data = np.ones(100)
data[70:] -= np.arange(30)

plt.annotate(
    'The day I learnt\ncooking food',
    xy=(70, 1), arrowprops=dict(arrowstyle='->'), xytext=(15, -10))

plt.plot(data)

plt.xlabel('Time')
plt.ylabel('My Hunger')

plt.show()