Just run `ruby tee.rb`

tee.rb

require "set"
@mantras = Set.new

trap "SIGINT" do
  puts "YOU HAVEN'T FINISHED YET!"
end

def learn(&instructions)
  instance_eval &instructions

  @mantras.each do |mantra|
    puts mantra
    breath
  end while true
end

def that(mantra)
  @mantras << mantra
end
alias :to :that

def breath
  sleep 1
end

if __FILE__ == $0
  learn {
    that "Smart code is not good code"
    to   "Keep it simple, stupid"
    that "You don't always need a distributed system"
    that "Principles are more important than tools"
    that "Programming doesn't make anyone a better human"
    to   "Read the fucking manual"
  }
end