Run `montage` commands to create go-mochi 4 bits counters.

montage-go-mochi.py

# Run `montage` commands to create go-mochi 4 bits counters.

import subprocess
import itertools

mochi_bit = ['mochi-dark2.png', 'mochi.png']
bits_list = itertools.product((0, 1), (0, 1), (0, 1), (0, 1))
# => [(0, 0, 0, 0), (0, 0, 0, 1), ...]

for bits, n in zip(bits_list, range(16)):
    mochi_list = ' '.join(map(lambda bit: mochi_bit[bit], bits))
    filename = f'go-mochi-{n:04b}.png'
    command = f'montage {mochi_list} -geometry 128x128+2+2 {filename}'.split(
        ' ')
    # => montage mochi-dark2.png mochi-dark2.png mochi-dark2.png mochi-dark2.png -geometry 48x48+2+2 go-mochi-0000.png
    subprocess.call(command)