[Jay.]

pawn Код:

public OnPlayerSpawn(playerid)
{
    SetTimer("toilet", 3600000, true);
        return 1;        
}

forward toilet(playerid);
public toilet(playerid)
{
    SendClientMessage(playerid, COLOR_RED, "Your blather is full, you need to go to the toilet quick!((You got 5 minutes))");
    SetTimer("Hastogo", 300000, false);
}
forward Hastogo(playerid);
public Hastogo(playerid)
{
    SendClientMessage(playerid, COLOR_RED, "You could not hold it in anylonger! You've started to urinate!");
        if(IsPlayerInAnyVehicle(playerid))
        {
            SendClientMessage(playerid, COLOR_RED, "Quick, get out! You dont want to pee all over de car seat dont you?");
        }
        else
        {
            SetPlayerSpecialAction(playerid, 68);
        }
        return 1;
    }

EDIT below:

The name with settimer must have ex: " timerblabla" you missed them. And no problem
Happy to help