#define PIN_TRIG 13
#define PIN_ECHO 12

void setup() {
  Serial.begin(115200);
  pinMode(PIN_TRIG, OUTPUT);
  pinMode(PIN_ECHO, INPUT);
  for(int i=2;i<=11;i++)
  {
    pinMode(i,OUTPUT);
  }
}

void loop() {
  // Start a new measurement:
  digitalWrite(PIN_TRIG, HIGH);
  delayMicroseconds(10);
  digitalWrite(PIN_TRIG, LOW);

  // Read the result:
  int duration = pulseIn(PIN_ECHO, HIGH);
  int distance=duration/58;
  int onValue=distance/40;
  for(int i=1;i<=onValue;i++)
  {
    digitalWrite(i+1, HIGH);
  }
  for(int j=onValue;j<=10;j++)
  {
    digitalWrite(j+1, LOW);
  }
  delay(50);
}