#define DT 400
#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};
const int data[ROW] = {0x00,0x20,0x60,0xFC,0xFC,0x60,0x20,0x00};

int mapBuffer[ROW][ROW];
int t=0;

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);
  digitalWrite(G1,LOW);
  moveBuffer();
}

void loop() {
  prnBuffer();
  t = (t+1) % DT;
  if(t%DT==0) shiftBuffer();
}

void moveBuffer(){
  int i,j,k;
  for(i=0;i<ROW;i++){
    for(j=0,k=1;j<ROW;j++,k<<=1){
       mapBuffer[i][j] = data[i] & k;
    }
  }
}

void shiftBuffer(){
  int i,j,u;
  for(i=0;i<ROW;i++){
     u=mapBuffer[i][ROW-1];
     for(j=ROW-1;j>0;j--){
        mapBuffer[i][j] = mapBuffer[i][j-1];
     }
     mapBuffer[i][0] = u;
  }
}

void prnBuffer(){
   int i, j, k, r, u;
   for(i=LOW;i<=HIGH;i++){
      for(j=LOW;j<=HIGH;j++){
         for(k=LOW;k<=HIGH;k++){
            digitalWrite(G1,0);
            digitalWrite(scan[2],i);
            digitalWrite(scan[1],j);
            digitalWrite(scan[0],k);
            r = (i<<2) | (j<<1) | k;
            for(u=0;u<ROW;u++) digitalWrite(row[u] , mapBuffer[r][u]);
            digitalWrite(G1,1);
         }
      }
   }
}