F8:: SetTimer, Looped, 5
F8 UP:: SetTimer, Looped, OFF
;F8 Loop works only while is pressed

F10:: ;toggle function
if (tgl := !tgl) 
{
SetTimer,Looped, 1000
Tooltip, Looped On, 0,0
}
Else
Reload
Return

Looped:
;your code here
Return