30x30 panels

int CLK = 8;
int OE = 9;
int LAT = 10;

int A = A0;
int B = A1;
int C = A2;
//int D = A3;

int r1 = 2;
int g1 = 3;
int b1 = 4;

int r2 = 5;
int g2 = 6;
int b2 = 7;

bool state = false;

unsigned long tt = 0;
unsigned long cc = 0;


void setup() {

  Serial.begin(115200);

  pinMode(r1, OUTPUT);
  pinMode(g1, OUTPUT);
  pinMode(b1, OUTPUT);

  pinMode(r2, OUTPUT);
  pinMode(g2, OUTPUT);
  pinMode(b2, OUTPUT);

  pinMode(A, OUTPUT);
  pinMode(B, OUTPUT);
  pinMode(C, OUTPUT);
  //pinMode(D, OUTPUT);

  pinMode(CLK, OUTPUT);
  pinMode(OE, OUTPUT);
  pinMode(LAT, OUTPUT);

  digitalWrite(r1, HIGH);
  digitalWrite(g1, HIGH);
  digitalWrite(b1, HIGH);

   digitalWrite(r2, HIGH);
   digitalWrite(g2, HIGH);
   digitalWrite(b2, HIGH);

  digitalWrite(OE, HIGH);
  digitalWrite(LAT, HIGH);
  //digitalWrite(CLK, HIGH);

  digitalWrite(A, LOW);
  digitalWrite(B, LOW);
  digitalWrite(C, LOW);
  delay(1000);

  //  digitalWrite(A, HIGH);
  //  digitalWrite(B, HIGH);
  //  digitalWrite(C, HIGH);
  //  delay(500);

}

void loop() {


  // Turn off display
   digitalWrite(OE, HIGH);

  for ( int i = 0; i < 5 ; i++ ) {

    //  digitalWrite ( D, i & 8 ) ;
    digitalWrite ( C, i & 4 ) ;
    digitalWrite ( B, i & 2 ) ;
    digitalWrite ( A, i & 1 ) ;

     for (int j = 0; j < 90; j++) {

    switch ( i ) {
      case 0 :
          digitalWrite(r1, HIGH);
          digitalWrite(g1, LOW);
          digitalWrite(b1, HIGH);

          digitalWrite(r2, HIGH);
          digitalWrite(g2, LOW);
          digitalWrite(b2, HIGH);
          break;

      case 1:
          digitalWrite(r1, HIGH);
          digitalWrite(g1, LOW);
          digitalWrite(b1, HIGH);

          digitalWrite(r2, HIGH);
          digitalWrite(g2, LOW);
          digitalWrite(b2, HIGH);
          break;

      case 2:
          digitalWrite(r1, HIGH);
          digitalWrite(g1, LOW);
          digitalWrite(b1, HIGH);

          digitalWrite(r2, HIGH);
          digitalWrite(g2, LOW);
          digitalWrite(b2, HIGH);
          break;

      case 3:
          digitalWrite(r1, HIGH);
          digitalWrite(g1, LOW);
          digitalWrite(b1, HIGH);

          digitalWrite(r2, HIGH);
          digitalWrite(g2, LOW);
          digitalWrite(b2, HIGH);
          break;

      case 4:
          digitalWrite(r1, HIGH);
          digitalWrite(g1, LOW);
          digitalWrite(b1, HIGH);

          digitalWrite(r2, HIGH);
          digitalWrite(g2, LOW);
          digitalWrite(b2, HIGH);
          break;

      default:
        break;
    }

    digitalWrite(CLK, state);
    delayMicroseconds(10);
    state = !state;
   } // end of push data for loop

   // After each addr, unlatch
    digitalWrite(LAT, HIGH);
    delayMicroseconds(20);
    digitalWrite(LAT, LOW);
    delayMicroseconds(20);

  } // end of addr for loop

   // After entire screen is drawn, turn on display ( OE LOW )
    digitalWrite(OE, LOW);
    delay(1000);



  if ( millis() - tt  > 5000 ) {
    // blank the screen
    Serial.println("Clear Screen");
    digitalWrite(OE, HIGH);
    delay(1000);
    digitalWrite ( C, HIGH );
    digitalWrite ( B, HIGH );
    digitalWrite ( A, HIGH );
    delay(1000);
    tt = millis();
  }


}