sample_timer

3s 3sec
4s 4sec

timer.rb

#!/usr/bin/env ruby

ARGV.each do |e|
  text = File.read(e)
  text.split("\n").each do |line|
    span, message = line.split(/ |,/)
    sec = case span[-1]
          when 's' then span[0..-2].to_i
          when 'm' then span[0..-2].to_i * 60
          end
    sleep sec
    system("say '#{message}'")
  end
end