miao
- http://www.imagemagick.org/script/install-source.php?ImageMagick=9s6tlikqbn5eb0u0spg5o38sa4#unix
- https://www.rubydoc.info/gems/tco/0.1.8
- https://www.rubydoc.info/gems/rmagick/4.2.5
- https://github.com/gosu/gosu/wiki/Getting-Started-on-Linux
- https://www.ruby2d.com/learn/linux/#install-packages
- https://rubygems.org/gems/tco
- https://rubygems.org/gems/gosu
- https://rubygems.org/gems/rmagick
- https://github.com/gosu/gosu/wiki