# cd /tmp && python3 -m venv . && . bin/activate && pip install pillow
from PIL import Image

# brightness = 256
brightness = 128
primes = []
def isPrime(n):
	for i in range(2, n // 2 + 1):
		if n % i == 0:
			return False
	return True

for i in range(2560):
	primes.append(isPrime(i))

img = Image.new('RGB', (2560, 1440))
for y in range(img.height):
	for x in range(img.width):
		if primes[y] and primes[x]:
			c = (x * y) % brightness
			img.putpixel((x, y), (c, c, c))

img.save('prime.png')