[HARD] Assign a unique variable value for each player! (Entering vehicles automatically like in /taxirace)

Information
In this tutorial I will tell you how to assign a unique variable value to a player. This is used in events like /taxirace where players automatically enter a different vehicle depending on how many players there are in the property.

It can be applied to different things but has its limitations. There are other methods of course and I'll probably post them in the future.

Before starting
Read through these:

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Shorter: [You must be registered and logged in to see this link.]
Longer (Property Variable section at the bottom): [You must be registered and logged in to see this link.]

Guide
Note that the indexes marked in green and used in red will be different for you most likely! So replace them with your own indexes by pressing /propedit and entering the pickups to get their index.

1. You need to have a variable that increases by 1 everytime someone enters your property. That variable can be /addchangevariablepickup var_count 1. Let's say this is Index 20 that is created.
2. Next we must give each player the current value of var_count into their own player variable: var_player_index. We do that by using /addplayervariablepickup var_player_index $var_count$. Let's say this is index 21 created.
3. Next we make an addtriggerpickup2 and include the indexes of both the pickups above: /addtriggerpickup2 20 21. Let's say this get index 22.
4. Then we do /setpropjoinpickup 22.

So far what are the results so? Every time a player joins the property: var_count will increase by 1 and the player variable (which is unique for the player) will get the current value of var_count. What this leads to is that each player will have a variable that is different from another player. Why do we want that? Because we can use that to force each player into a different vehicle.

5. Now let's create some enter vehicle pickups all going to a different vehicle index using: /addvehenterpickup <Vehicle Index>. Make one for each vehicle Index. The index of the pickups after getting created are 23 to 53 in this example.

6. Now each pickup should make it so you enter one vehicle. We want every player to enter a different one. To do this we use our player variable: var_player_index that will increase by one for each player.

To do this we set the conditions for the pickups:

/changepickupcondition 23 player_vehicle == ON_FOOT AND var_player_index == 1
/changepickupcondition 24 player_vehicle == ON_FOOT AND var_player_index == 2
......
/changepickupcondition 52 player_vehicle == ON_FOOT AND var_player_index == 29
/changepickupcondition 53 player_vehicle == ON_FOOT AND var_player_index == 30
7. Next we set the autotriggerpickup for each  /addvehenterpickup pickup which in my this case is 23 to 50

First we do a /addtriggerpickup and then we autotrigger it!
/addtriggerpickup 23 50

/autotriggerpickup 50 2 1 0


Now players will be teleported into a unique vehicle even if they exit.

The vehicle enter pickups can now be moved to a location like /gotoloc militaryglitch or you can use /setpickupfake so that players don't accidently enter them.


Problems:
- If a player leaves the property and over 30 people enter in total we will run out of runs but if you had enough and actually make it into a minigame players will not leave after the game has already been started.