Arduino Wireless Proximity-Based Power Switch

int trigPin = 13;
int echoPin = 12;
int switchPin = 8;

int maxDist = 200;// 3m
int cutoff = 0;
int absenseCounter = 0;
int timeout = 10;
int cycleTime = 1500; //ms between checks
boolean active = false;

void setup() {
  Serial.begin (9600);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(switchPin, OUTPUT);
}

void loop() {

  cutoff = map(analogRead(A5),0,1023,0,maxDist);

  long duration, distance;
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  distance = (duration/2) / 29.1;

  Serial.print("(");
  Serial.print(cutoff);
  Serial.print(") ");
  Serial.print(distance);
  Serial.print(" cm");

  if (distance <= cutoff) {
    if( !active) {
      trigger();
      active = true;
    }
    absenseCounter = 0;
    Serial.println("");
  }else if (distance > cutoff || distance <= 0){
    Serial.println(" (Out of range)");
    if(++absenseCounter >= timeout && active) {
      trigger();
      active = false;
    }
  }
  delay(cycleTime);
}

void trigger() {
  digitalWrite(switchPin,HIGH);
  delay(20);
  digitalWrite(switchPin,LOW);

  Serial.println("TRIGGERING");
}