// waa waa pedal

unsigned long settledTimerPreset = 1000;
unsigned long settledTimerAccValue;
unsigned long pulseTimerPreset = 500;
unsigned long pulseTimerAccValue;

byte settledOutputPin = 6;
byte pulseOutputPin = 4;

int threshold = 25;

void setup() {
  Serial.begin(115200);
  pinMode(settledOutputPin, OUTPUT);
  pinMode(pulseOutputPin, OUTPUT);
}

void loop() {
  bool belowThreshold, settled;
  static bool lastSettled;

  int potValue = analogRead(A0);

  belowThreshold = (potValue < threshold ? true : false);

  if (belowThreshold) {
    pulseTimerAccValue = millis(); // reset pulse timer
    digitalWrite(pulseOutputPin, LOW); // reset rising output
  }
  else settledTimerAccValue = millis(); // reset settled timer

  if (millis() - settledTimerAccValue >= settledTimerPreset) {
    digitalWrite(settledOutputPin, HIGH);
    settled = true;
  }
  else {
    digitalWrite(settledOutputPin, LOW);
    settled = false;
  }

  if (settled and !lastSettled) {
    if (millis() - pulseTimerAccValue < pulseTimerPreset) {
      digitalWrite(pulseOutputPin, HIGH);
    }
    else digitalWrite(pulseOutputPin, LOW);
  }
  lastSettled = settled;

} // end of loop