[coool]

You have to learn about timers. Consider the wiki.

PHP код:

CMD:cmdname(playerid, params[])
{
    SetTimerEx("CommandTimer", Time, 0, "i", playerid); //Run a timer. When the command executes
    return 1;
}
forward CommandTimer(playerid);
public CommandTimer(playerid)
{
   //The things you want to do.
}