Bwahahahaha and ha.
1. Opted to disregard specialized code/software for the reasons of code-illiteracy -- the contradiction being that the native code for the pulse sensor blinks an LED. Meh.
2. Bcz the sensor is placed on a finger with very little to ensure consistent application, the analog values varied giving irregular peak values. To adjust per each application, we (me) added a pot to adjust the peak triggering value (high).
3. The Blair Witch Project is best served when watched alone. To accompany another is to give an identifiable secured surrounding relieving the immersive stresses permitted by the film's atmosphere. It is a superb horror film you nay saying butt holes!