Touch face texture changer

default
{
    touch_start(integer num_detected)
    {
        integer face = llDetectedTouchFace(0);
        string texture = "name or uuid of texture";

        if (face == TOUCH_INVALID_FACE)
      {
            llOwnerSay("The touched face could not be determined");
      }
        else
     {
            llSetPrimitiveParams([PRIM_TEXTURE,face,texture,<1.0, 1.0, 0.0>, <0.0, 0.0, 0.0>, 0.0]); // face,texture,repeats, offset, rotation.
      }
    }
}