#define LED7_L 8
#define COM_L 4
const int SEG[LED7_L]={6,7,8,9,10,11,12,13};
const int com[COM_L]={2,3,4,5};
const byte Number[19]={B00111111,B00000110,B01011011,B01001111,B01100110,B01101101,B01111101,B00000111,B01111111,B01101111,B1011111,B01111100,B01011000,B01011110,B01111011,B01110001,B00111111,B00000110,B01011011};

int delayTime,Time;
int index;

void setup() {
  int i;
  for(i=0;i<LED7_L;i++) pinMode(SEG[i],OUTPUT);
  for(i=0;i<COM_L;i++) pinMode(com[i],OUTPUT);
  delayTime = 200; index = Time = 0;
}

void loop() {
  int i,j,k;
  for(i=0;i<COM_L;i++){
    for(k=0;k<COM_L;k++){
      digitalWrite(com[k],1);
    }
    digitalWrite(com[i],0);
    for(j=0,k=1;j<LED7_L;j++, k<<=1){
       digitalWrite(SEG[j],!(k & Number[i+index]));
    }
    delay(1);
  }
  Time++;
  if((Time % delayTime)==0){
    Time=0;
    index++;
    if(index==16) index=0;
  }
}