[RSX]

Second way:
1. Check all the time if player is using this key, for example, KEY_FIRE (likely to be ctrl), keys differ onfoot/invehicle
Forkilling=SetTimer("Function'sName", from 200 till 500, Repeat most likely 1);

pawn Код:

public FunctionsName(playerid, keys, updown, leftright)
{
    new keys, updown, leftright;
    GetPlayerKeys(playerid, keys, updown, leftright);
    if(keys&KEY_FIRE) OR if(keys==KEY_FIRE)
    {
        //ToDo
        if(DoneAll) KillTimer(Forkilling);
    }
}