Scripts to "appear/disappear" Objects.

Hi, my goal is to try to understand how the scripting system works for scenery objects, particularly, making objects appear and disappear based on the time of day. My goal is to have ai "car_park" objects appear and disappear based on the time of day.

I found this code from one of the static "people_standing" objects and was wondering if someone could explain the different functions and variables used in the .osc file to make the appear/disappear variable work:

{frame}

    (L.L.appear) 0 =
    {if}
    
        100 random (S.L.randomint)
        (L.L.randomint) 30 <
        {if}
            5 3600 * (S.L.appear)
            23 3600 * (S.L.disappear)
        {else}
            (L.L.randomint) 70 <
            {if}
                7 3600 * (S.L.appear)
                21 3600 * (S.L.disappear)
            {else}
                10 3600 * (S.L.appear)
                18 3600 * (S.L.disappear)
            {endif}            
        {endif}
            
        1800 random 900 - (S.L.randomseconds)
        
        (L.L.appear) (L.L.randomseconds) + (S.L.appear)
        (L.L.disappear) (L.L.randomseconds) + (S.L.disappear)
        
    {endif}
        
    (L.S.Time) (L.L.appear) > (L.S.Time) (L.L.disappear) < &&
    {if}
        1 (S.L.visible)
    {else}
        0 (S.L.visible)
    {endif}

{end}

I'd like to understand how to edit this code to my specification so that I don't need to ask this question every time!

I have edited the code now so that in the editor, the "car_park" object appears and disappears at the right time using the "Environment" tab. However, when I go in game, the parked cars do not spawn/despawn when I change the time of day. Is this a limitation of the game?

Edit: No Need! Found Solution!