unsigned long t=0;
int Isec=0;
int IIsec=0;
int Imint=0;
int IImint=0;
unsigned long st=0;
unsigned long rt=0;
int pressCount=0;
unsigned long pressTime=0;

void setup()
{
 Serial.begin(9600);
 pinMode(2,INPUT_PULLUP); 
 pinMode(5,INPUT_PULLUP); 
 pinMode(12,INPUT_PULLUP); 

 Serial.print(IImint);
 Serial.print(Imint);
 Serial.print(":");
 Serial.print(IIsec );
 Serial.println(Isec);
 
}

void loop()
{
  
 int start=digitalRead(2);
 int stop=digitalRead(5);
 int reset=digitalRead(12);
 int resume=digitalRead (5);

  while (start==LOW && reset==HIGH)
  {
    reset=digitalRead (12);
    if (reset==LOW)
    { Isec=0; IIsec=0; Imint=0; IImint=0; Serial.print(IImint);
   Serial.print(Imint);
   Serial.print(":");
   Serial.print(IIsec );
   Serial.println(Isec); break;}

    if(millis()-t >=1000)
    
    { 
      
      Serial.print(IImint);
      Serial.print(Imint);
      Serial.print(":");
      Serial.print(IIsec );
      Serial.println(Isec);
      t=millis(); 
      
    
     Isec++;
     if(Isec>=10) {Isec=0;   IIsec++;}
     
     if(IIsec>=6 && Isec>=0) { IIsec=0; Isec=0; Imint++; }

     if(Imint>=10) {Imint=0;  IImint++;}


    }
    
    //STOP COMMAND 
    stop=digitalRead (5);
    while(stop==LOW && reset==HIGH ) 
    {

      if (pressCount==0 && stop==LOW)
      { 
       delay(300);
       pressCount=1;
       Serial.println(pressCount);
      }

       
       
     reset =digitalRead (12);
     if (reset==LOW)
     { Isec=0; IIsec=0; Imint=0; IImint=0;
      Serial.print(IImint);
      Serial.print(Imint);
      Serial.print(":");
      Serial.print(IIsec );
      Serial.println(Isec); 
      break;
     }


       
       
        if(millis()-st >=1000)
        {
         Serial.print(IImint ) ;
         Serial.print(Imint ) ;
         Serial.print(":" ) ;
         Serial.print(IIsec ) ;
         Serial.println (Isec  ) ;
         st=millis();
        }
       

       


     //RESUME COMMAND 
     resume=digitalRead (5);
     if(resume==LOW && pressCount ==1) 
     {delay(300); Serial.println("RESUME"); pressCount=0; break;}
     
    

    

    


  }

  
 }

}