Rubik Timer

#include <EEPROM.h>
#include <TimerOne.h>
#include <avr/pgmspace.h>
#include "TM1637.h"
#define ON 1
#define OFF 0

int8_t TimeDisp[] = {0x00, 0x00, 0x00, 0x00};
unsigned char ClockPoint = 1;
unsigned char Update;
unsigned char microsecond_10 = 0;
unsigned char second;
unsigned char _microsecond_10 = 0;
unsigned char _second;
unsigned int eepromaddr;
boolean Flag_ReadTime;
int state;

#define CLK 16//pins definitions for TM1637 and can be changed to other ports
#define DIO 17
TM1637 tm1637(CLK, DIO);
int L;
int R;

void setup()
{
  Serial.begin(9600);
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(15, INPUT);
  tm1637.init();
  Timer1.initialize(10000);//timing for 10ms
  Timer1.attachInterrupt(TimingISR);//declare the interrupt serve routine:TimingISR
  tm1637.set(BRIGHT_DARKEST);
  state = 0;
  digitalWrite(5, LOW);
  digitalWrite(6, LOW);
  L = 960;
  R = 970;
}
void loop()
{
  stopwatchReset();
  while (1)
  {
    if (analogRead(7) < R && analogRead(0) < L && state == 0)
    {
      while (analogRead(7) < R && analogRead(0) < R)
      {
        digitalWrite(6, HIGH);
        digitalWrite(5, HIGH);
        delay(100);
        if (analogRead(7) > R || analogRead(0) > L)
        {
          digitalWrite(5, LOW);
          digitalWrite(6, LOW);
          stopwatchStart();
          state = 1;
          Serial.println(state);
          break;
        }
      }
    }
    if (analogRead(7) < R && analogRead(0) < L && state == 1)
    {
      stopwatchPause();
      Serial.println(state);
      state = 2;
      Serial.println(state);
      delay(500);
    }
    if (digitalRead(15) == HIGH && (state == 2 || state == 1))
    {
      stopwatchReset();
      state = 0;
      Serial.println(state);
    }
    if (analogRead(7) < R && state == 1)
    {
      digitalWrite(6, HIGH);
    }
    if (analogRead(0) < L && state == 1)
    {
      digitalWrite(6, HIGH);
    }
    if (analogRead(7) < R && analogRead(0) < L && state == 2)
    {
      digitalWrite(6, HIGH);
    }

    //    case 'S':stopwatchStart();Serial.println("Start timing...");break;
    //    case 'P':stopwatchPause();Serial.println("Stopwatch was paused");break;
    //    case 'L':readTime();break;
    //    case 'W':saveTime();Serial.println("Save the time");break;
    //    case 'R':stopwatchReset();Serial.println("Stopwatch was reset");break;
    if (Update == ON)
    {
      TimeUpdate();
      tm1637.display(TimeDisp);
    }
    else
    {
      digitalWrite(6, LOW);
    }
  }
}





void TimingISR()
{
  microsecond_10 ++;
  Update = ON;
  if (microsecond_10 == 100) {
    second ++;
    if (second == 60)
    {
      second = 0;
    }
    microsecond_10 = 0;
  }
  ClockPoint = (~ClockPoint) & 0x01;
  if (Flag_ReadTime == 0)
  {
    _microsecond_10 = microsecond_10;
    _second = second;
  }
}
void TimeUpdate(void)
{
  if (ClockPoint)tm1637.point(POINT_ON); //POINT_ON = 1,POINT_OFF = 0;
  else tm1637.point(POINT_ON);
  TimeDisp[2] = _microsecond_10 / 10;
  TimeDisp[3] = _microsecond_10 % 10;
  TimeDisp[0] = _second / 10;
  TimeDisp[1] = _second % 10;
  Update = OFF;
}
void stopwatchStart()//timer1 on
{
  Flag_ReadTime = 0;
  TCCR1B |= Timer1.clockSelectBits;
}
void stopwatchPause()//timer1 off if [CS12 CS11 CS10] is [0 0 0].
{
  TCCR1B &= ~(_BV(CS10) | _BV(CS11) | _BV(CS12));
}
void stopwatchReset()
{
  stopwatchPause();
  Flag_ReadTime = 0;
  _microsecond_10 = 0;
  _second = 0;
  microsecond_10 = 0;
  second = 0;
  Update = ON;
}
void saveTime()
{
  EEPROM.write(eepromaddr ++, microsecond_10);
  EEPROM.write(eepromaddr ++, second);
}
void readTime()
{
  Flag_ReadTime = 1;
  if (eepromaddr == 0)
  {
    Serial.println("The time had been read");
    _microsecond_10 = 0;
    _second = 0;
  }
  else {
    _second = EEPROM.read(-- eepromaddr);
    _microsecond_10 = EEPROM.read(-- eepromaddr);
    Serial.println("List the time");
  }
  Update = ON;
}