[Norck]

I quess in this case it's better to use OnObjectMoved callback instead of timer, kinda:

pawn Код:

// gObj - global var which stores objectid
// bool:gState - global var which stores current state of the object (false = 'left', true = 'right')
public OnObjectMoved(objectid)
{
    if(objectid == gObj)
    {
        if(gState)
        {
            // Move object to the 'left' here  
            gState = false;           
        }
        else
        {
            // Move object to the 'right' here
            gState = true;
        }
    }
    return 1;
}