#include <TM1637Display.h>
#define rel 2
#define start 3
#define reset 4
//#define set 7
#define decr 8
#define incr 9
#define DIO 5
#define CLK 6

int mins, sec;

TM1637Display display(CLK, DIO);
 
void setup() 
{
   pinMode(rel, OUTPUT);
   pinMode(start, INPUT_PULLUP);
   pinMode(reset, INPUT_PULLUP);
   //pinMode(set, INPUT_PULLUP);
   pinMode(incr, INPUT_PULLUP);
   pinMode(decr, INPUT_PULLUP);
   
   display.setBrightness(0x0f);
   mins=2;
   sec=59;
   
}

void loop() 
{   
   display.showNumberDecEx(mins, 0b01000000, true,2,0);   
   display.showNumberDecEx(sec, 0b01000000, true,2,2); 

   delay(1000);

   if(sec==0)
   {
      sec=60;
      mins--;
      if(mins==-1)
        mins=2;
   }
   sec--;    
}