$ composer global require divivaes/php-project-lvl1
$ cd $HOME/.composer/vendor/divivaes/php-project-lvl1
$ php bin/brain-even
$ php bin/brain-calc
$ php bin/brain-gcd
$ php bin/brain-progression
[]
(https://asciinema.org/a/DZRoS09QjOKKiVmcqmjLGhmpw)
[]
(https://asciinema.org/a/j45IbphogtGEoCNoteEkqYlyD)