setTimer(function()
    local vehicles=getElementsByType('vehicle')
    for _, vehicle in pairs(vehicles) do
        if getElementHealth(vehicle)<300 then
            setVehicleDamageProof(vehicle, true)
        elseif getElementHealth(vehicle)>301 then
            if getVehicleController (vehicle) then
            setVehicleDamageProof(vehicle, false)
            end
        end
     end
end, 500, 0)