const int trigPin = 12;
const int echoPin = 14;
const int ledPin = 13;
long duration;
int distance;
int pins[] = {23, 22, 21, 19, 18, 5, 17};
int data[9][7] = {
  {1, 0, 0, 1, 1, 1, 1}, // digit1
  {0, 0, 1, 0, 0, 1, 0}, // digit2
  {0, 0, 0, 0, 1, 1, 0}, // digit3
  {1, 0, 0, 1, 1, 0, 0}, // digit4
  {0, 1, 0, 0, 1, 0, 0}, // digit5
  {0, 1, 0, 0, 0, 0, 0}, // digit6
  {0, 0, 0, 1, 1, 1, 1}, // digit7
  {0, 0, 0, 0, 0, 0, 0}, // digit8
  {0, 0, 0, 1, 1, 0, 0}  // digit9
};

void setup() {
  for (int x = 0; x <= 6; x++) {
    pinMode(pins[x], OUTPUT);
  }
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(ledPin, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  distance = duration * 0.034 / 2;
  Serial.print("Distance=");
  Serial.println(distance);

  if (distance >= 1 && distance < 10) {
    for (int x = 0; x <= 6; x++) {
      digitalWrite(pins[x], data[distance-1 ][x]);
    }
    delay(2000);
  }


  delay(500);
}