sudo gem install Text
require 'rubygems'
require 'text'
font = Text::Figlet::Font.new('slant.flf')
figlet = Text::Figlet::Typesetter.new(font)
puts figlet['Daddy Cool']
↓出力
____ __ __ ______ __
/ __ \____ _____/ /___/ /_ __ / ____/___ ____ / /
/ / / / __ `/ __ / __ / / / / / / / __ \/ __ \/ /
/ /_/ / /_/ / /_/ / /_/ / /_/ / / /___/ /_/ / /_/ / /
/_____/\__,_/\__,_/\__,_/\__, / \____/\____/\____/_/
/____/