zombie.rb

def notify(msg)
  system("notify-send", msg)
end

Signal.trap("HUP") { 
  3.downto(1) { |n| notify("#{n}..."); sleep 1 }
  notify("DEATH!")
  exit
}

Thread.new do
  loop {
    notify("waiting..")
    sleep 1.1
  }
end

loop { sleep 1 }