[Konstantinos]

Do you know what the code you wrote does?

pawn Код:

if(pBloodtype == 1)
{
    if(pBloodtype == 2)
    {
        if(pBloodtype == 3)
        {
            if(pBloodtype == 4)
            {
                if(pBloodtype == 5)
                {
                    if(pBloodtype == 6)
                    {
                        PlayerInfo[playerid][BloodType] = pBloodtype;
                    }
                }
            }
        }
    }
}

Of course, it's not going to work. If you want to get a random number, assign it to BloodType and return that random number, then use:

pawn Код:

stock BLOODTYPE(playerid)
{
    new pBloodtype;
    pBloodtype =  1 + random(6);
    PlayerInfo[playerid][BloodType] = pBloodtype;
    return pBloodtype;
}

If you want to do something, then please explain it.