import matplotlib.pyplot as plt
import numpy as np

x = np.arange(1,21) 

y1 = np.array([1,2,3,4,5])
y1 = np.tile(y1,4)
y2 = np.array([10,12,14,16])
y2 = np.repeat(y2, 5)

plt.step(x,y1, where='post',label ='VAR1')
plt.step(x,y2,where = 'post',label = 'VAR2')

plt.xticks([])
plt.yticks([])

plt.xlabel('time')
plt.ylabel('value')
plt.legend()
plt.title("How VAR2 Works")
plt.show()