You start out with 15 balls. Their content is invisible to you. At least one of them holds “Negative energy”. Each round you have to pick out one ball. If you pick a ball with “Negative energy” the game is over. Each round, the number of balls decrease, meaning that the probability of picking a “Negative energy” ball will increase. How long will you be able to keep the “Positive energy” going? Use your focus and meditation (or pure luck ;-)) to choose right!