Automatic doors i need help

ok last time i posted that i needed help with an automatic door,i have the script but i dont know how to use it. if any one can help me out.this script is driving me insane



integer OpenO = FALSE;

OPENW()
{
if(Open == FALSE)
{

llSetPos(llGetPos() + <0,1,0>;
llSetPrimitiveParams([PRIM_SIZE, <0.01, 0.01, 6.09>]);
Open = TRUE;

}
}

CLOSEW()
{
if(Open == TRUE)
{

llSetPos(llGetPos() - <0,1,0>;
llSetPrimitiveParams([PRIM_SIZE, <0.340, 1.719, 6.339>]);
Open = FALSE;

}
}
default
{
state_entry()
{
llSensorRepeat("",NULL_KEY,AGENT,4,PI,1);
}

sensor(integer num_detected)
{
OPENW();
}
no_sensor()
{
CLOSEW();
}

}

just use this code:

    integer doorState = FALSE;
integer     DIRECTION   = -1;       // direction door opens in. Either 1 (outwards) or -1 (inwards);

    integer bitChange ( integer bit )
    {
        if ( bit == TRUE )
        {
            return FALSE;
        }
        else
        {
            return TRUE;
        }
    }

    integer door(integer open) {
    if (open) {
        llSetRot(llEuler2Rot(<0, 0, -DIRECTION * PI_BY_TWO>) * llGetRot());
        return TRUE;
    } else { // close
        llSetRot(llEuler2Rot(<0, 0, DIRECTION * PI_BY_TWO>) * llGetRot());
        return FALSE;
    }

then what ever you want to trigger the door just call, doorState = door ( bitChange ( doorState ) );