Unity3D2020 version of the model are the two objects through an empty together, after carrying the script, unable to move, add BoxCollider, only give the empty or give two child objects, not make, and move into a cube, strives for the big show,

Here is a mobile script,

 void the Update () 

{

GameObject. Transform. Translate (new Vector3 (0, 0, 1) * Time. The deltaTime * 10); 

}