life --demo glidergun --out glider_gun.gif --ppc 10 --pos TL -W60 -H40

pip install golpy

usage: life [-h] (-i GRID_INPUT | -d DEMO) [-o FILE | --debug-print]
            [-W WIDTH] [-H HEIGHT] [-M MAX_GEN] [--ppc PIXELS] [-P POSITION]
            [-p]

optional arguments:
  -h, --help            show this help message and exit
  -i GRID_INPUT, --in GRID_INPUT
                        Parse the initial grid from <GRID_INPUT>
  -d DEMO, --demo DEMO  Try one of the provided demos: one of 'glidergun' and
                        'glidergen'
  -o FILE, --out FILE   Place the output into <FILE>
  --debug-print         Print the generated frames directly to the terminal,
                        instead of saving them

  -W WIDTH, --width WIDTH
                        Width of the grid
  -H HEIGHT, --height HEIGHT
                        Height of the grid

  -M MAX_GEN, --max-gen MAX_GEN
                        Number of generations to simulate
  --ppc PIXELS          Set the width and the height of each cell to <PIXELS>
  -P POSITION, --pos POSITION
                        One of 'C', 'T', 'B', 'L', 'R', 'TL', 'TR', 'BL', and
                        'BR'

  -p, --profile         Measure the performance

python -m golpy # ...