#include <Arduino.h>
#include <TM1637Display.h>
#define CLK 4
#define DIO 5

TM1637Display display(CLK, DIO);

void setup() {
}

void loop() {
  float d = ultrasonic(3, 2); // Trig, Echo
  display.setBrightness(0x0f);
  display.showNumberDec((int)d, false);
  delay(500);
}

float ultrasonic(int Trig, int Echo) {
  pinMode(Trig, OUTPUT);
  pinMode(Echo, INPUT);
  digitalWrite(Trig, LOW);   delayMicroseconds(2);
  digitalWrite(Trig, HIGH);  delayMicroseconds(10);
  digitalWrite(Trig, LOW);
  float dist = pulseIn(Echo, HIGH) / 58;
  return dist;
}