My lua script needs help

[bakenast]

I made this auto click script for a logitech gaming mouse it works fine,, but only activated by when i click a mouse button, I am trying to make it activated by when I hit a Key instead. does anyone know how i can make this work  here is the current  working script  thanks

 

function OnEvent(event, arg)
if (event == "MOUSE_BUTTON_PRESSED" and arg == 5) then
MoveMouseTo(21299,12267)
PressAndReleaseMouseButton(1)
MoveMouseTo(7653,18546)
end

end