[leonardo1434]

It should be like This.

pawn Code:

forward countdown(number)
public countdown(number)
{
    new l_2[4];
    if(number > 0) {
        format(l_2),sizeof(l_2),"%d",number - 1);
        GameTextForAll(l_2, 1000, 4);
        SetTimer("timer", 1000, false);
    }
    else {
        GameTextForAll("Go", 1000, 4);
    }
}