"""
============
Fill Between
============

Fill the area between two curves.
"""
import matplotlib.pyplot as plt
import numpy as np

x = np.arange(-5, 5, 0.01)
y1 = -5*x*x + x + 10
y2 = 5*x*x + x

fig, ax = plt.subplots()
ax.plot(x, y1, x, y2, color='black')
ax.fill_between(x, y1, y2, where=(y2 > y1), facecolor='yellow', alpha=0.5)
ax.fill_between(x, y1, y2, where=(y2 <= y1), facecolor='red', alpha=0.5)
ax.set_title('Fill Between')

plt.show()

#############################################################################
#
# ------------
#
# References
# """"""""""
#
# The use of the following functions, methods, classes and modules is shown
# in this example:

import matplotlib
matplotlib.axes.Axes.fill_between