#include <Arduino.h>
#include <TM1637Display.h>
#define CLK 3
#define DIO 4
TM1637Display display(CLK, DIO);
void setup()
{
   display.setBrightness(5);        //ความสว่าง
   display.clear();
   delay(200);   
   pinMode(13,OUTPUT);
}
int n,m,s,t;
void loop()
{
   s = n%60;
   m = n/60;
   t = m*100+s;
   display.showNumberDecEx(n,0b01000000,1,4,0);   
   delay(500);
   display.showNumberDecEx(n,0b00000000,1,4,0);
   delay(500);
   n++;
   if((m==0) &&  (s == 10))
     digitalWrite(13,0);
     
   if((m==0) &&  (s == 20))
     digitalWrite(13,0);

   
}