#define ECHO_PIN 8
#define TRIG_PIN 11

int ledPin1 = 4;
int ledPin2 = 5;
int ledPin3 = 6;
int saklar = 7;
int on3 = 0;

void setup(){
  Serial.begin(9600);
  pinMode(ledPin1, OUTPUT);
  pinMode(ledPin2, OUTPUT);
  pinMode(ledPin3, OUTPUT);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  pinMode(saklar, INPUT);
}
float readDistanceCM() {
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  int duration = pulseIn(ECHO_PIN, HIGH);
  return duration * 0.034 / 2;
}
void on1(){
  float distance = readDistanceCM();
  bool isNearby = distance < 31.5;
  digitalWrite(ledPin3, HIGH);
  delay(16000);
  digitalWrite(ledPin3, LOW);
  Serial.print("Measured distance: ");
  Serial.println(distance, 1);
  delay(1000);
}
void on2(){
  float distance = readDistanceCM();
  bool isNearby = distance > 15;
  digitalWrite(ledPin1, HIGH);
  digitalWrite(ledPin2, HIGH);
  delay(19000);
  digitalWrite(ledPin1, LOW);
  digitalWrite(ledPin2, LOW);
  Serial.print("Measured distance: ");
  Serial.println(distance, 1);
  delay(1000);
}
void loop() {
  if(digitalRead(saklar) == HIGH) {
    digitalWrite(ledPin1, HIGH);
    digitalWrite(ledPin2, HIGH);
    delay(19000);
  } else {
    digitalWrite(ledPin1, LOW);
    digitalWrite(ledPin2, LOW);
    on1();
    on2();
  }
}