leds.ino

#define SENSOR_START_INDEX 4
#define SENSOR_END_INDEX 8

void loop() {
  bool sensorIsTripped = readFromSensor();
  
  for (var i = 0; i < NUM_LEDS; i++) {
    if (sensorIsTripped && i >= SENSOR_START_INDEX && i < SENSOR_END_INDEX) {
      leds[i] = CGRB::Green;
    } else {
      leds[i] = CRGB::Red;
    }
  }
  
  FastLED.show();
}