Touch Button Android

I put this script in the Button and Cube to Play the Cube animation when the button be touched, is a touch button script. What is Wrong, is not working!

var btnTexture : Texture; function OnGUI() {

 if (!btnTexture) {
     Debug.LogError("Please assign a texture on the inspector");
     return;
 }
 if (GUI.Button(Rect(10,10,50,50),btnTexture))
     Debug.Log("Clicked the button with an image");
     animation["Play"].speed= 1.0;
     animation.Play("Play");

} function ResetAnimation(curAnim : AnimationState) {

 yield WaitForSeconds(curAnim.length);
 animation.Play("Idle");

}