void setup() {
  // put your setup code here, to run once:
  volatile char *dirf,*dirl,row,charecter;
  dirf=0x30;dirl=0x10a;
  *dirf=0xff;*dirl=0xff;
  volatile char *outf,*outl;
  volatile long i;
  // To rotate welome left to right 21 iterations required
  volatile char a[]={0x00,0x00,0x00,0x05,0x07,0x05,0x00,0x00};
  volatile char b[]={0x00,0x00,0x00,0x0a,0x0f,0x0a,0x00,0x00};
  volatile char c[]={0x00,0x00,0x00,0x15,0x1f,0x15,0x00,0x00};
  volatile char d[]={0x00,0x00,0x00,0x2b,0x3e,0x2a,0x00,0x00};
  volatile char e[]={0x00,0x00,0x00,0x57,0x7e,0x55,0x00,0x00}; 
  volatile char f[]={0x00,0x00,0x00,0xae,0xfb,0xaa,0x00,0x00};
  volatile char g[]={0x00,0x00,0x00,0x5d,0xf6,0x55,0x00,0x00};
  volatile char h[]={0x00,0x00,0x00,0xba,0xed,0xaa,0x00,0x00};
  volatile char j[]={0x00,0x00,0x00,0x75,0xdb,0x55,0x00,0x00};
  volatile char k[]={0x00,0x00,0x00,0xfa,0xb7,0xaa,0x00,0x00};
  volatile char l[]={0x00,0x00,0x00,0x55,0x6f,0x55,0x00,0x00};
  volatile char m[]={0x00,0x00,0x00,0xaa,0xdf,0xaa,0x00,0x00};
  volatile char n[]={0x00,0x00,0x00,0x55,0xbf,0x55,0x00,0x00};
  volatile char o[]={0x00,0x00,0x00,0xab,0x7e,0xaa,0x00,0x00};
  volatile char p[]={0x00,0x00,0x00,0x56,0xfc,0x54,0x00,0x00};
  volatile char q[]={0x00,0x00,0x00,0xac,0xf8,0xa8,0x00,0x00};
  volatile char r[]={0x00,0x00,0x00,0x58,0xf0,0x50,0x00,0x00};
  volatile char s[]={0x00,0x00,0x00,0xb0,0xe0,0xa0,0x00,0x00};
  volatile char t[]={0x00,0x00,0x00,0x60,0xc0,0x40,0x00,0x00};
  volatile char u[]={0x00,0x00,0x00,0xc0,0x80,0x80,0x00,0x00};
  volatile char v[]={0x00,0x00,0x00,0x80,0x00,0x00,0x00,0x00};
  outf=0x31;
  outl=0x10b;
  while(1){
    for(charecter=0;charecter<21;charecter++){
      for(row=0;row<8;row++){      
        if(charecter==0) *outf=a[row];
        if(charecter==1) *outf=b[row];
        if(charecter==2) *outf=c[row];
        if(charecter==3) *outf=d[row];
        if(charecter==4) *outf=e[row];
        if(charecter==5) *outf=f[row];
        if(charecter==6) *outf=g[row];
        if(charecter==7) *outf=h[row];
        if(charecter==8) *outf=j[row];
        if(charecter==9) *outf=k[row];
        if(charecter==10) *outf=l[row];
        if(charecter==11) *outf=m[row];
        if(charecter==12) *outf=n[row];
        if(charecter==13) *outf=o[row];
        if(charecter==14) *outf=p[row];
        if(charecter==15) *outf=q[row];
        if(charecter==16) *outf=r[row];
        if(charecter==17) *outf=s[row];
        if(charecter==18) *outf=t[row];
        if(charecter==19) *outf=u[row];
        if(charecter==20) *outf=v[row];
        *outl=~(1<<row);
        for (i = 0; i < 8000; i++);  // Short delay to visualize the row
        *outl=0xff;
        *outf=0x00;        
      }
      //for(i=0;i<300000;i++);  // delay between each charecter 
    }    
  }
}

void loop() {
  // put your main code here, to run repeatedly:

}