c# - Unity3d attach texture to the cube problems -

i have created cube in scene , want attach texture cube scripting. problem there no error of code cube doesn't change after press run in program...

here code

using unityengine; using system.collections;  public class testing : monobehaviour {   void start(){      texture2d tex = (texture2d)resources.load("bluecolortex.png", typeof(texture2d));     renderer.material.maintexture = tex;  }  } 

void start() {     texture2d tex = (texture2d)resources.load("bluecolortex", typeof(texture2d));     renderer.material.maintexture = tex; } 

resources.load not use extensions. common mistake.

returns asset @ path if can found otherwise returns null. objects of type t returned. path relative resources folder inside assets folder of project, extensions must omitted.

from: http://docs.unity3d.com/scriptreference/resources.load.html