int outpin=11;// initialize pin 11
int inpin=4;// initialize pin 4
int val;// define val



#define echoPin 7 // Echo Pin
#define trigPin 8 // Trigger Pin
#define LEDPin 13 // Onboard LED
int maximumRange = 200; // Maximum range needed
int minimumRange = 0; // Minimum range needed
long duration, distance; // Duration used to calculate distance

void setup() {
 Serial.begin (9600);

pinMode(outpin,OUTPUT);// set LED pin as “output”
pinMode(inpin,INPUT);// set button pin as “input”


 pinMode(trigPin, OUTPUT);
 pinMode(echoPin, INPUT);
 pinMode(LEDPin, OUTPUT); // Use LED indicator (if required)
}

void loop() {



  val=digitalRead(inpin);// read the level value of pin 4 and assign if to val
  Serial.println(val);
if (val==1) // check if the button is pressed, if yes, turn on the LED
{ digitalWrite(outpin,LOW);

  int m = millis();
/* The following trigPin/echoPin cycle is used to determine the
 distance of the nearest object by bouncing soundwaves off of it. */
 digitalWrite(trigPin, LOW);
 delayMicroseconds(2);

 digitalWrite(trigPin, HIGH);
 delayMicroseconds(10);
 digitalWrite(trigPin, LOW);
 duration = pulseIn(echoPin, HIGH);

 //Calculate the distance (in cm) based on the speed of sound.
 distance = duration/58.2;

 if (distance >= maximumRange || distance <= minimumRange){
 /* Send a negative number to computer and Turn LED ON
 to indicate "out of range" */
 Serial.println("-1");
 digitalWrite(LEDPin, HIGH);
 }
 else {
 /* Send the distance to the computer using Serial protocol, and
 turn LED OFF to indicate successful reading. */

 Serial.println(distance);
 if (distance < 60){
  Serial.println(m);}
 digitalWrite(LEDPin, LOW);
 }

 //Delay 50ms before next reading.
 delay(50);}


 else
{ digitalWrite(outpin,HIGH);}
}