Calculates and displays biorhythm graphs. Enter your birthdate and this Applet and it will calculate your biorhythms. It computes your 23-day physical, 28-day emotional, 33-day intellectual and combined cycles. The combined cycle is sometimes called the luck cycle. The theory of biorhythms is when the cycles are positive/high you will have high energy. When they are negative/low you will have low energy. When they are zero or critical, you will have unstable energy