sorry,

on *:TEXT:*:#:{
  if ($1 == !mimic) {
    if (!$2) {
      msg $chan 2[G]15iVe Me A NiCk To MiMiC.
      msg $chan !mimic <nick> <secs>
      halt
    }
    elseif ($3 isnum 1-) {
      set %mimic $2 
      set %mimicnick $nick
      msg $chan 2 $+ [H]15eY $2 I WiLl CoPy WhAtEvEr YoU SaY.
      msg $chan 2 [I]15 WiLl NoW MiMiC $2 FoR $3 SeCoNdS 
      timer 1 $3 msg $chan 2 %mimic [I]15s No LoNgEr BeInG MiMiCeD YoUr TiMe RaN OuT.
      timer 1 $3 unset %mimic %mimicnick
    }
  } 
  elseif ($1 == !unmimic) {
    if ($nick == %mimicnick) {
      msg $chan 2 $+ %mimic [A]15ww CmOn WhY YoU GoTtA Do ThAt.
      unset %mimic
    }
    else msg $chan 2[Y]15oU wErEnT tHe NiCk ThAt SaId !MiMiC
  }
  if ($nick == %mimic) {
    msg $chan $1- 
  }
}
on *:Action:*:#:{
  if ($nick == %mimic) {
    Describe $chan $1-
  }
}

i mesd up a little, thats right ^^