# -*- coding: utf-8 -*-
import numpy as np
import matplotlib
matplotlib.use('TkAgg')
import matplotlib.pyplot as plt
greyhounds=500
labs=500
grey_height=28+4*np.random.randn(greyhounds)
lab_height=24+4*np.random.randn(labs)

plt.hist([grey_height,lab_height],stacked=True,color=['r','b'])
plt.show()

