Mesh transparency halfway cutoff script

Hello! I'm a noob to unity scripting, but have a task to make a building, that would be schematycally cutted a half to see the inside interrior and still see the walls at the back side. I've found a script here http://answers.unity3d.com/questions/372487/shader-distance-between-worldspacecamerapos-and-ve.html which should work fine, as i can see, and tried to re-arrange it in java, but thanks to my noobness i'm getting an errors. The script for now looks like this:

 var dist = 2;
     var mesh : Mesh;
     var vertices : Vector3[];
     var colors : Color[];
     var walls : GameObject;
 function Start()
 {
     var mesh : Mesh = GetComponent(MeshFilter).mesh;
     var vertices : Vector3[] = mesh.vertices;
     var colors: color = new Color[vertices.Length];
 }
 
         function Update()
 {
        if(tag == "Player")
       {
            if (Vector3.Distance(transform.TransformPoint.vertices[i], walls.transform.position) > dist)
           {
                colors[i] = new Color(0, 0, 0, 0);
           } 
           else 
          {
               colors[i] = new Color(0, 0, 0, 1 - Vector3.Distance(transform.TransformPoint(vertices[i]), walls.transform.position) / dist);
          }
          mesh.colors = colors;
      }
 }

And there's an error DirTest.js(10,17): BCE0018: The name 'color' does not denote a valid type ('not found'). Did you mean 'UnityEngine.Color'? Would you please help me to solve this?