Adding hotkeys to start multiple timers

#include <GUIConstants.au3>
#include <Date.au3>
 
 
Dim $Timer1Active = 0, $Timer2Active = 0
Global $reference1 = 100, $reference2 = 100
 
AdlibRegister("AllTimers")
 
GUICreate("Temporizadores", 990, 370)
 
GUICtrlSetState(-1,$GUI_SHOW)
;TEMPORIZADOR 1
$Button_11 = GuiCtrlCreateButton("Start", 5, 70, 50, 20)
$Button_12 = GuiCtrlCreateButton("Stop", 55, 70, 50, 20)
$Label_1 = GuiCtrlCreateLabel("00", 5, 40, 100, 30, 0x1000)
 
;TEMPORIZADOR 2
$Button_21 = GuiCtrlCreateButton("Start", 115, 70, 50, 20)
$Button_22 = GuiCtrlCreateButton("Stop", 165, 70, 50, 20)
$Label_2 = GuiCtrlCreateLabel("00", 115, 40, 100, 30, 0x1000)
 
GUISetState()
 
While 1
    $msg = GUIGetMsg()
    Select
        Case $msg = $Button_11
            $Timer1Active = 1
            $timer1 = TimerInit()
            $reference1 = (60*(1)+0)*1000; segundos
        Case $msg = $Button_12
            $Timer1Active = 0
            GUICtrlSetData($Label_1, "00")
 
        Case $msg = $Button_21
            $Timer2Active = 1
            $timer2 = TimerInit()
            $reference2 = (60*(2)+0)*1000; segundos
        Case $msg = $Button_22
            $Timer2Active = 0
            GUICtrlSetData($Label_2, "00")
 
        Case $msg = $GUI_EVENT_CLOSE
    EndSelect
    If $msg = $GUI_EVENT_CLOSE Then ExitLoop
WEnd
 
Func AllTimers()
Local $Secs, $Mins, $Hour
Local $Time1, $Time2
Local $sTime1 = $Time1, $sTime2 = $Time2
   
 If $Timer1Active =1 Then
        _TicksToTime(Int(TimerDiff($timer1)), $Hour, $Mins, $Secs)
        $Time1 = StringFormat("%02i:%02i:%02i", $Hour, $Mins, $Secs)
        GUICtrlSetData($Label_1, $Secs)
    EndIf
    
    If $Timer2Active = 1 Then
        _TicksToTime(Int(TimerDiff($timer2)), $Hour, $Mins, $Secs)
        $Time2 = StringFormat("%02i:%02i:%02i", $Hour, $Mins, $Secs)
        GUICtrlSetData($Label_2, $Secs)
    EndIf
EndFunc