Mischievous Time

#include <TimerOne.h>
#include <DS1307.h>
#include "Ultrasonic.h"
#include "TM1637.h"

int8_t TimeDisp[] = {0x00,0x00,0x00,0x00};
unsigned char ClockPoint = 1;
long RangeInCentimeters;

DS1307 clock;
Ultrasonic ultrasonic(6);
#define CLK 2//pins definitions for TM1637 and can be changed to other ports
#define DIO 3
TM1637 tm1637(CLK,DIO);

void TimeUpdate(void)
{
  clock.getTime();
  if(ClockPoint)tm1637.point(POINT_ON);
  else tm1637.point(POINT_OFF);
  TimeDisp[0] = clock.hour / 10;
  TimeDisp[1] = clock.hour % 10;
  TimeDisp[2] = clock.minute / 10;
  TimeDisp[3] = clock.minute % 10;
  tm1637.display(TimeDisp);
}

void TimingISR()
{
  ClockPoint = (~ClockPoint) & 0x01;
}

void setup() {
  Serial.begin(115200);
  clock.begin();
  tm1637.set();
  tm1637.init();
  Timer1.initialize(500000);//timing for 500ms
  Timer1.attachInterrupt(TimingISR);
}

void loop() {
  RangeInCentimeters = ultrasonic.MeasureInCentimeters();
  if(RangeInCentimeters <= 50)
  {
    tm1637.clearDisplay();
    tm1637.point(POINT_OFF);
  }else
  {
    TimeUpdate();
  }
}