import matplotlib.pyplot as plt

x_values = list(range(1001))
y_values = [ x**2 for x in x_values]
plt.scatter(x_values, y_values, c=y_values, cmap=plt.cm.Blues, edgecolor='none', s=40)
#plt.show()
plt.savefig('squares_plot.png', bbox_inches='tight')
