int pinLed = 6;
int pinBuzzer = 7;


#define trigPin 2
#define echoPin 3
long duration;
int distance;





void setup() {
  // put your setup code here, to run once:
pinMode(pinLed, OUTPUT);
pinMode(pinBuzzer, OUTPUT);
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);

Serial.begin(9600);
}

void loop() {
  // Clear the trigPin by setting it LOW:
  digitalWrite(trigPin, LOW);
  delayMicroseconds(5);
  // Trigger the sensor by setting the trigPin high for 10 microseconds:
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  // Read the echoPin, pulseIn() returns the duration (length of the pulse) in microseconds:
  duration = pulseIn(echoPin, HIGH);
  // Calculate the distance:
  distance = duration * 0.034 / 2;
  // Print the distance on the Serial Monitor (Ctrl+Shift+M):
  Serial.print("Distance = ");
  Serial.print(distance);
  Serial.println(" cm");
  delay(50);


  if (distance > 200){
  digitalWrite(pinLed, HIGH);    
  digitalWrite(pinBuzzer, LOW);
  }
  else {
  digitalWrite(pinLed, LOW);   
  digitalWrite(pinBuzzer, HIGH);
  }
  
   

}