#include <TM1637Display.h>
#define CLK 3
#define DIO 4
#define CLK2 5
#define DIO2 6
int state = 2;
TM1637Display displayleft = TM1637Display(CLK, DIO);
TM1637Display displayright = TM1637Display(CLK2, DIO2);
byte dot = 255;
void setup()
{
  //set the display brightness (0-7)
  displayleft.setBrightness(5);
  displayright.setBrightness(5);
  //Clear the display
  displayleft.clear();
  displayright.clear();
   displayleft.showNumberDecEx(1000, dot);
  displayright.showNumberDecEx(1000, dot);
  pinMode(8, INPUT_PULLUP);
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
}
int minleft = 10;
int secleft = 0;
int minright = 10;
int secright = 0;
void loop()
{
  if(state == 1)
  {
    if(secright == 0)
    {
      minright--;
      secright = 59;
    }
    else
    secright--;
    int timeright=minright * 100 + secright;
    if(timeright > 0)
    {
      displayright.showNumberDecEx(timeright, dot);
    }
  }
  else if(state == 0)
  {
    if(secleft == 0)
    {
      minleft--;
      secleft = 59;
    }
    else
    secleft--;
    int timeleft = minleft * 100 + secleft;
    if (timeleft > 0)
    {
      displayleft.showNumberDecEx(timeleft, dot);
    }
    else
    {

    }
  }
  for(int j = 0; j < 100; j++)
  {
    chkbtn();
    delay(10);
    if(state == 0)
    {
      digitalWrite(9, HIGH);
      digitalWrite(10, LOW);
    }
    else if(state == 1)
    {
      digitalWrite(10, HIGH);
      digitalWrite(9, LOW);
    }
  }

}
bool chkbtn()
{
  if(digitalRead(8) == LOW)
    {
      while(digitalRead(8) == LOW);
      if(state == 0)
      state = 1;
      else
      state = 0;
    }
}