Lua Scripting for Vehicles getting Stuck in mud

Hi I need help with some coding,

My Idea is that a Vehicle moves in to a Top_layer in this case mud, it will have a chance of either damage its engine or excuses pipe.

Track vehicle like tanks and halftrack would have a less chance of getting stuck then a wheeled vehicle such as jeep or kubelwagen.

So a wheeled vehicle would have a 30% chance of getting damage to its excuses pipe

Halftracks and light and medium tanks would have a 20% of getting a overloaded engine

Heavy tanks would get a 35% chance of engine break down in the mud.

1. So in the code I need the following , to Identifier top_layer texture and make it react to vehicles entering such areas on the map where the above would happen.

2. I need a % calculator to calculate the % chance of vehicles and tanks getting stuck in the mud and it would run randomly between ever 2-5 min to contest Vehicle, driving around in the mud.

So this is the coding I am trying to made.

I need your help and Ideas to how to make such a code..

So right now I have chosen the Kubelwagen as a test vehicles.
-----------------------------------------------------------------------------------------------
function OnInitID()

-- [[ Markers ]]

-- [[ Squad Groups ]]
--When entering mud layer top layer Vehicle will get a random chance off damage engine or excurse


_top_layer=true

--Germans Forces
= If
_kubelwagen_type_82_mp ={ability = kubelwagen_type82_mp, isvehicle=true}

= Then

import random
if random.randint(0,100) < 36:
do_stuff(_disable_vehicles=true)


-- [[ Entity Groups ]]

end


Please help me with some ideas off what I am doing wrong.

best regards Von_Smedman