Hello, is there any skiner to help me?

I'd like to make UX file that changes overview ( on or off) when speed is less then 65 km/h.

I tried in GJ-AK skin and it works (put below lines in customized.lua):

if vActiveState() == "st_easynav" and wTemp_overview_distance ~= nil then
sc_overview_check()

if MODEL.navigation.car.current_speed() < "65" then
MODEL.map.primary.camera_settings.overview_enabled = false
else
MODEL.map.primary.camera_settings.overview_enabled = true
end

end

I tried to make UX for that but not success.