#include <NewPing.h>

#define TRIGGER_PIN  6  // Arduino pin tied to trigger pin on the ultrasonic sensor.
#define ECHO_PIN     7  // Arduino pin tied to echo pin on the ultrasonic sensor.
#define MAX_DISTANCE 300 // Maximum distance we want to ping for (in centimeters). Maximum sensor distance is rated at 400-500cm.
NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE); // Creating the NewPing Object.

void setup() {
  Serial.begin(115200); // Begin serial com. at 115200 baud rate.
  pinMode(13, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(11, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(8, OUTPUT);
}

void loop() {
  delay(50);                      // Wait 50ms between pings (about 20 pings/sec). 29ms should be the shortest delay between pings.
  unsigned int uS = sonar.ping(); // Send ping, get ping time in microseconds (uS).
  int cm = uS / US_ROUNDTRIP_CM;
  Serial.print("Ping: ");
  Serial.print(cm); // Convert ping time to distance in cm and print result (0 = outside set distance range)
  Serial.println("cm"); //If you would like ping in inches, remove "US_ROUNDTRIP_CM" and the backslash, don't forget to rename "cm" to "inches"
  int typ;
  typ = map(cm, 1, 70, 1, 7);
  switch(typ)
  {
    case 1:
    digitalWrite(13, HIGH);
    break;



    case 2:
       digitalWrite(13, HIGH);
    digitalWrite(12, HIGH);

    break;
    case 3:
       digitalWrite(13, HIGH);
    digitalWrite(12, HIGH);
    digitalWrite(11, HIGH);

    break;
    case 4:
       digitalWrite(13, HIGH);
    digitalWrite(12, HIGH);
    digitalWrite(11, HIGH);
    digitalWrite(10, HIGH);

    break;
    case 5:
       digitalWrite(13, HIGH);
    digitalWrite(12, HIGH);
    digitalWrite(11, HIGH);
    digitalWrite(10, HIGH);
    digitalWrite(9, HIGH);

    break;
    case 6:
       digitalWrite(13, HIGH);
    digitalWrite(12, HIGH);
    digitalWrite(11, HIGH);
    digitalWrite(10, HIGH);
    digitalWrite(9, HIGH);
    digitalWrite(8, HIGH);
    break;
    case 7:
       digitalWrite(13, LOW);
    digitalWrite(12, LOW);
    digitalWrite(11, LOW);
    digitalWrite(10, LOW);
    digitalWrite(9, LOW);
    digitalWrite(8, LOW);
    break;

    default:
        digitalWrite(13, LOW);
    digitalWrite(12, LOW);
    digitalWrite(11, LOW);
    digitalWrite(10, LOW);
    digitalWrite(9, LOW);
    digitalWrite(8, LOW);
    break;


  }
  Serial.print(typ);