A python script for generating a dither SVG in any size

gray-gen.py

import sys
import math


size = int(sys.argv[1]) if len(sys.argv) > 1 else 4

# https://www.wolframalpha.com/input?i=solve+s*s%2F2+%3D+%28pi*r%5E2%29*2+for+r
radius = size / (2 * math.sqrt(math.pi))

print(f"""<svg version="1.1" width="{size}" height="{size}" xmlns="http://www.w3.org/2000/svg">
    <rect width="100%" height="100%" fill="white" />
      
    <circle cx="0" cy="0" r="{radius}" fill="black" />
    <circle cx="{size}" cy="0" r="{radius}" fill="black" />
    <circle cx="0" cy="{size}" r="{radius}" fill="black" />
    <circle cx="{size}" cy="{size}" r="{radius}" fill="black" />

    <circle cx="{size / 2}" cy="{size / 2}" r="{radius}" fill="black" />
</svg>""")