grid-of-greys.py

#!/bin/env python3
print ("<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>")
print ("<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\" \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">")
print ("<svg width=\"17.6mm\" height=\"17.6mm\" viewBox=\"0 0 17.6mm 17.6mm\" xmlns=\"http://www.w3.org/2000/svg\">")
for y in range (16):
        for x in range (16):
                value = 255 - y * 16 - x
                fill = f"#{value:02x}{value:02x}{value:02x}"
                print (f"<rect x=\"{x * 1.1}mm\" y=\"{y * 1.1}mm\" width=\"1.1mm\" height=\"1.1mm\" fill=\"{fill}\"/>")
print ("</svg>")