int latchPin=12;
int clockPin=13;
int dataPin=11;

unsigned char smgduan[] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x00};
unsigned char bitMa[] = {0x01,0x02,0x04,0x08};
unsigned int cnt = 0;

void setup() {
  pinMode(latchPin,OUTPUT);
  pinMode(clockPin,OUTPUT);
  pinMode(dataPin,OUTPUT);
  }

void  display(unsigned  char duan,unsigned char ch)
{
  unsigned char temp;
  digitalWrite(latchPin,LOW);
  temp = ~smgduan[duan];
  shiftOut(dataPin,clockPin,MSBFIRST,temp);
  shiftOut(dataPin,clockPin,MSBFIRST,bitMa[ch]);

  digitalWrite(latchPin,HIGH);
  }

void loop()
{
  unsigned char weibuff[4],i;

  weibuff[0] = (cnt%100)%10;
  weibuff[1] = (cnt%100)/10;
  weibuff[2] = (cnt%1000)/100;
  weibuff[3] = cnt/1000;
  for(i=0;i<4;i++)
  {
    display(weibuff[i],i);
    }

  
  }