collision_Klee.cs

    void OnCollisionEnter(Collision target) {

        // create a gameobject (a cube for this demo) name it "enemy"
        // and your argument(target) is setup so that object can be collided with
        if (target.gameObject.name == "enemy") {
            // Change the player's color to green when collide occurs
            gameObject.GetComponent<Renderer>().material.color = Color.green;
        }
    }