Someone

 on *:TEXT:!startevent:#:{ 
    /msg $chan event starts in: 30secs! 
    .timer 1 5 msg $chan 25secs left till the event! 
    .timer 1 10 msg $chan 20secs left till event w00t! 
    .timer 1 15 msg $chan 15secs left till event w00t!
    .timer 1 20 msg $chan 10secs left till event w00t!
    .timer 1 25 msg $chan 5secs left till event w00t!
    .timer 1 30 msg $chan EVENT STARTED W00T!!
  }