Changing Texture of Plane depending on Position

It's very easy, but do you know C# or JavaScript? You will need it. How you're gonna implemente this varies somewhat, depending on how you want it. I'll assume you want it the one that was on the vídeo: only on X axis, if it moves somewhat (say 0.1), than change texture. The video that you sent may generate the textures as the plane goes, but still.

Here is some code:

 using UnityEngine;
 
 public class TextureAtlas : MonoBehaviour{
 
     public GameObject plane; //The plane where the textures will be
     public Texture[] Array; //On the Inspector, set the size of the array and drag the texture in the wanted order
     public float axisLength; //Length of the place where the textures will be

     Shader planeShader;  //The texture is inside the shader. The plane shall have a shader of it's own. If a wall has the same shader, both the plane and the wall will have it's texture changed.
     Vector3 lastPositon;  //Position of the plane on the last frame. If has changed, we go into deciding if we shall change the texture or not
     float changeDistance;  //The spare distance between each texture. If the axisLength is 10meters, and you have 5 textures, the textures will change every 2 meters.
     float origin; //The place at X where the plane was when the scene began running
 
     void Start(){
 
         lastPosition = plane.transform.position;
         planeTexture = plane.transform.GetComponent<Texture>();
         changeDistance = axisLength / Array.length;
         origin = plane.transform.position.x;
 
     }
 
     void Update(){
 
         if(lastPosition != plane.transform.position){
         }else if(plane.transform.x < origin){
             planeTexture = Array[0];
         }else if(plane.transform.x > origin+axisLength){
             planeTexture=Array[Array.length - 1];  //every Array has a length property on C#. Length - 1 is the last texture
         }else{
             uint index = (uint)((plane.transform.x - origin)/changeDistance);
             planeTexture = Array[index];
         }

         lastPosition = plane.transform.position; 

}