Creating a flat object as a finish line.

I am looking to create an object that will perform the functions of a finish line. Essentially what I am looking to do is, create an empty game object, add a box collider, then ‘paint’ just the floor with a finish line texture. What I cannot find how to do is create that floor.

Any guidance will be helpful, thanks.

Why can’t you just go to game object → create other → plane. Then add a texture. done.