ॐ हम (बॉयफ्रेंड नेम) माँ वशं कुरु कुरु स्वाहा !! To know this example, you've to grasp the experiment of burning hearth by focusing the rays from the lens at a single place. Your situation is exact same in both of those. If You're not in a position to keep https://www.youtube.com/watch?v=WG3Cevb_VHM