gui, add, button, gButton1, hello
gui, add, button, gbutton2, cow dissapear
gui, show, w200 h200

RETURN ; <---- Needed to End the AutoExecute section
       ; so your script doesn't plow right ahead to
       ; the next lines of code


button1:
{
    ExclamationPoints = 0
    setTimer SpamCow, 10
    return ; <---------- Return goes inside the {}
}

button2:
{

    SetTimer SpamCow, Off
    ToolTip
    return
}

SpamCow:
{
    ExclamationPoints := ExclamationPoints + 1
    if ExclamationPoints = 50
        ExclamationPoints = 0
    Tail=
    Loop %ExclamationPoints%
    {
        Tail = %Tail%!
    }

    tooltip Cow%Tail%
    Return
 }
;Closing
guiescape:
guiclose:
menuexitprogram: ; this label MenuExitProgram is technically not necessary
                 ; but there's no harm in using it :)
{
  exitapp
}