/*This is a PIR sensor sheep counter with 4 led indicator
If sheep enter in the gate the count of sheeps in will be shown as in - no. and the 4 led will glow in forward direcion.
If sheep exits out of the gate the count of sheps out will be shown as out - no. and the 4 leds will glow in backward direction .
Total number os sheeps in the field will be displayed as total - no.*/