collisionExit_Klee.cs

   void OnCollisionExit(Collision collisionInfo) {
        
        // not calling collisionInfo at this time but we can get the additional information using
        // for example: collisionInfo.transform.name 
        
        // change player's color to red when collision is ended (not touching each other) 
        gameObject.GetComponent<Renderer>().material.color = Color.red;
    }