m pretty proud at this script :)
especially cause i found a way to make it millisecond precise lol
typ /reaction or push F7 to start
then it explains it all really...
it just checks how fast ur reaction is
my highscore, 204ms lol

alias reaction {
  /window -c @reaction
  window -paCk0 +bfnt @Reaction -1 -1 300 300
  /drawtext @reaction 4 2 5 Push the dot when the color changes!
  /drawtext @reaction 4 2 25 Top score: $iif(%topscore == $null,0,%topscore)
  var %timer = $r(2000,8000)
  .timer -m 1 %timer /react
}
alias f7 {
  /window -c @reaction
  window -paCk0 +bfnt @Reaction -1 -1 300 300
  /drawtext @reaction 4 2 5 Push the dot when the color changes!
  /drawtext @reaction 4 2 25 Top score: $iif(%topscore == $null,0,%topscore)
  var %timer = $r(2000,8000)
  .timer -m 1 %timer /react
}
on *:input:@result:{
  if ($1 == quit) {
    window -c @result
    window -c @reaction
    unset %dot
  }
  if ($1 == restart) {
    /unset %dot
    window -c @result
    window -c @reaction
    /reaction
  }
}
on *:close:@Reaction:{
  .timers off
  window -c @result
  unset %dot
}
menu @Reaction {
  sclick:{
    if (!%dot) {
      window -c @reaction
    }
    if (%dot) {
      var %time = $calc($ticks - %dot)
      if (%time < %topscore) || (!%topscore) {
        window -e @Result -1 -1 400 200
        echo @Result Woohoo Good-job u have a new highscore!!
        echo @result new top time is: %time
        set %topscore %time ms
      }
      elseif (%time == %topscore) {
        window -e @Result -1 -1 400 200
        echo @Result Well good-job u have the exact same speed ;)
        echo @result ur speed was %time
      }
      elseif (%time > %topscore) {
        window -e @Result -1 -1 400 200
        echo @Result Oh oh, that wasnt such a good time ;)
        echo @result ur highscore is %topscore $+ , this score was %time
      }
      echo @result Wanna try again? typ restart in the edit-box
      echo @result wanna quit? typ quit in the edit-box
    }

  }
}
alias react {
  set %dot $ticks
  /drawdot @reaction $r(4,13) 100 150 150
}