#!/usr/bin/python3
import matplotlib
matplotlib.use('Agg')
import matplotlib.pyplot as plt
import numpy as np

def main():
	x=np.random.normal(0,1,1000)
	plt.hist(x,bins=30,edgecolor='black')
	plt.title('histogram plot')
	plt.xlabel('value')
	plt.ylabel('freq')
	plt.savefig('fig2.png',dpi=300,transparent=True)



if __name__=="__main__":
	main()