Simple alarm

alarm.rb

after = ARGV.join

def say(message)
  system "say -v Zarvox #{message}"
end

begin
  time = after.to_i
  puts "You will be notified after #{time} hours"
  sleep time * 60 * 60
  say('Wake up, Neo')
  sleep 10
  loop do
    say('Wake up!')
    sleep 0.5
  end
rescue
  puts "Invalid Time", "try to ruby alarm.rb 8"
end