import matplotlib.pyplot as plt
import numpy as np
n=1024
x=np.random.normal(0,1,n)
y=np.random.normal(0,1,n)
T=np.arctan2(y,x) #for color value

plt.scatter(x,y,s=75,c=T,alpha=0.5)
# plt.scatter(np.arange(5),np.arange(5))
plt.xlim((-1.5,1.5))
plt.ylim((-1.5,1.5))
plt.xticks(())
plt.yticks(())
plt.show()