#include <Arduino.h>
#include <TM1637Display.h>
#define CLK 3
#define DIO 4
TM1637Display display(CLK, DIO);
void setup()
{
display.setBrightness(1);  //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(t,0b01000000,1,4,0); //แสดงตัวเลข
delay(500);
display.showNumberDecEx(t,0b000000000,1,4,0); //แสดงตัวเลข
delay(500);
n++;
if((m == 0) && (s == 10))
   digitalWrite(13,1);

if((m == 0) && (s == 20))
   digitalWrite(13,0);
}