[Universal]

I'ts easy.

First, make the dialog:

Код:

ShowPlayerDialog(playerid,1,DIALOG_STYLE_LIST,"Available jobs","Office\nOthers","Ok","Cancel");

Now, after OnPlayerDialogResponse(blah,blah...), do this:

Код:

if(dialogid==1){
     if(response){
     if(listitem==0){
     new rand = random(ammount of coordinations u have in that array);
     SetPlayerCheckPoint(playerid,Coords[rand][0],Coords[rand][1],Coords[rand][2],5);
     }
     }
     }

You see, Coords[rand] name to the array you made with the coords. (it must be Float:Array) Like, my is Coords, and its Coords[rand]...

Do the rest of the on the callback OnPlayerEnterCheckPoint, you will have to use timers:

on the top of the script:

Код:

new Timer1;

and the timer, when you enter the checkpoint:

Код:

Timer1 = SetTimerEx("DoTheThing",TIME,false,"i",playerid);

DoTheThing - must be public callback made by you, for the rest things as you said...
Time - is the time in miliseconds...

Ok, so you should do rest of the thing, using this sample. Good luck !!!