how to open and close mini GUI independence in main GUI

[khang0001 0]

#include <GUIConstantsEx.au3>

Opt("GUIOnEventMode", 1)  ; Change to OnEvent mode 
$mainwindow = GUICreate("Hello World", 200, 100)
GUISetOnEvent($GUI_EVENT_CLOSE, "CLOSEClicked")
GUICtrlCreateLabel("Hello world! How are you?", 30, 10)
$okbutton = GUICtrlCreateButton("OK", 70, 50, 60)
GUICtrlSetOnEvent($okbutton, "OKButton")



GUISetOnEvent($GUI_EVENT_CLOSE, "CLOSEClicked")


GUISwitch($mainwindow)
GUISetState(@SW_SHOW)

While 1
  Sleep(1000)  
WEnd

Func OKButton()
  
GUICreate("next", 500,500,500,500)
GUISetState()   
EndFunc

Func CLOSEClicked()
  
  If @GUI_WINHANDLE = $mainwindow Then 
    Exit
  EndIf
EndFunc

when I click the button OK. It make 1 GUI next. I click 10 times in button Ok. it make 10 Gui next. how can I click 10 times in button OK. and it make 1 GUI next. and how can i close the GUI next independence with GUI hello world. please help meeeeee

[JoHanatCent 12]

when I click the button OK. It make 1 GUI next. I click 10 times in button Ok. it make 10 Gui next. how can I click 10 times in button OK. and it make 1 GUI next. and how can i close the GUI next independence with GUI hello world. please help meeeeee

Did you make time to go through this first?

Multi Gui