Stars

Index arrays with integer arrays to create dots.

import numpy as np
from PIL import Image

a = np.zeros((400, 400), dtype=np.uint8)
x = np.random.randint(0, 399, size=(100))
y = np.random.randint(0, 399, size=(100))

a[y, x] = 255

im = Image.fromarray(a)
im.save('stars.png')

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Challenge:

Create point clouds using other distribution functions.