keyboard - Autohotkey - hotkey 1 do something, key sequence 11 do another thing

Im pretty new in AHK, I would like Autohotkey to whenever I press the hotkey "1" in MS Word type HELLOW, but at the same time in the same app (MS Word) I want the key combination "11" (key 1 pressed two times very quickly) to type BYE, is this possible? will AHK type "1HELLOW" when I type "1", will it type "11BYE" when I type "11"? is it possible to do the same script but with F1 instead? I mean F1, and the key sequence F1F1 (F1 pressed twice very quickly)

So far I have tried this

~1::
;400 is the maximum allowed delay (in milliseconds) between presses.
if (A_PriorHotKey = "~1" AND A_TimeSincePriorHotkey < 400)
{
   Msgbox,Double press detected.
}
else if (A_PriorHotKey = "~1" AND A_TimeSincePriorHotkey > 400)
{
    Msgbox,Single press detected.
}
Sleep 0
KeyWait 1
return

But it just work the first time I press the key sequence 11 (1 pressed twice quickly) then it will always recognize only the 1 key, why???

~1::
if (A_PriorHotkey <> "~1" or A_TimeSincePriorHotkey > 400)
{
    ; Too much time between presses, so this isn't a double-press.
    KeyWait, 1
    return
}
MsgBox You double-pressed the 1 key.
return

this doesn't help to get the two hotkeys, (1 and 11) either.

Thanks Advanced.

Answer

It works best by using SetTimer:

    ; The following hotkeys work only if MS-WORD is the active window:
#If WinActive("ahk_exe WINWORD.EXE")    ; (1)
    1::
    if 1_presses > 0
    {
        1_presses += 1
        SetTimer Key1, 300
        return
    }
    1_presses = 1
    SetTimer Key1, 300
    return
    Key1:
    SetTimer Key1, off
    if 1_presses = 2
      SendInput, BYE
    else
      SendInput, HELLOW
    1_presses = 0
    return
    F2:: MsgBox, You pressed F2 in MS-Word
    ; The following hotkeys work only if NOTEPAD is the active window:
#If WinActive("ahk_exe NOTEPAD.EXE")
    1:: Send 2
    F2:: MsgBox, You pressed F2 in NOTEPAD
#If ; turn off context sensitivity (= end of context-sensitive hotkeys)
; The following hotkeys work only if MS-WORD or NOTEPAD is NOT the active window (because they are already defined in those programs):
1:: Send 3
F2:: MsgBox, You pressed F2 while  MS-WORD or NOTEPAD is NOT the active window
; The following hotkeys work in all windows (incl. MS-WORD and NOTEPAD because they are NOT defined in those programs)
F3:: MsgBox, You pressed F3
Esc:: ExitApp

https://autohotkey.com/docs/commands/SetTimer.htm#Examples (Example #3)

(1) Like the #IfWin directives, #If creates context-sensitive hotkeys and hotstrings and is positional: it affects all hotkeys and hotstrings physically beneath it in the script.