#define DelayTime 10
#define ROW 8
#define COL 3
#define G1 13

const int scan[COL] = {10,11,12};
const int row[ROW] = {2,3,4,5,6,7,8,9};

void setup() {
  for (int i = 0;i<COL;i++) pinMode(scan[i], OUTPUT);
  for (int i = 0;i<ROW;i++) pinMode(row[i], OUTPUT);
  pinMode(G1, OUTPUT);
}

void loop() {
  int i, j, k, r, u, t,dx=1;
  digitalWrite(G1,HIGH);t=0;
  for(i=LOW;i<=HIGH;i++)
    for(j=LOW;j<=HIGH;j++)
      for(k=LOW;k<=HIGH;k++){
        digitalWrite(scan[0],k);
        digitalWrite(scan[1],j);
        digitalWrite(scan[2],i);
        for(r=0;r<ROW;r++){
          for(u=0;u<ROW;u++){
            digitalWrite(row[u],(u==t));
            delay(DelayTime);
          }
          t+=dx;
          if(t<0){
            dx=1;t=0;
          }
          else if(t>=ROW){
            dx=-1;t=ROW-1;
          }
        }
      }
}