[CuervO]

You need to Forward the Function closegate, so you can Make the command...

pawn Код:

forward closegate();

Then, You make the Function... You make it to MoveObject the gate to the Original X,Y,Z...

pawn Код:

public closegate()
{
   MoveObject(gate,X,Y,Z, 1.5000);
   return 1;
}

Once, You can make the command... You set the timer... (1000 Milliseconds = 1 Second)

pawn Код:

public OnPlayerCommandText(playerid, cmdtext[])
{
    if(strcmp(cmd, "/opengate", true) == 0) 
    {
        MoveObject(gate,-293.828,1507.450,76.070,1.5000);
        SetTimer("closegate", 7000, false);
        return 1;
    }
}

And... Done...

For More Info Visit the Wiki

Functions Used:

MoveObject
SetTimer