//The LED's are connected 

const int ROW_1 = 1;     //pin for row 1
const int ROW_2 = 2;     //pin for row 2    
const int ROW_3 = 3;     //pin for row 3
const int ROW_4 = 4;     //pin for row 4    
const int ROW_5 = 5;     //pin for row 5

void setup() 
{
}

void loop()
{
  //turn on LED L11, L12, L13, L14
  pinMode(ROW_1, OUTPUT);     //row 1 output low
  digitalWrite(ROW_1, LOW);
  pinMode(ROW_2, OUTPUT);     //row 2 output high
  digitalWrite(ROW_2, HIGH);  
  pinMode(ROW_3, OUTPUT);     //row 3 output high
  digitalWrite(ROW_3, HIGH);  
 pinMode(ROW_4, OUTPUT);     //row 4 output high
  digitalWrite(ROW_4, HIGH);  
 pinMode(ROW_5, OUTPUT);     //row 5 output high
  digitalWrite(ROW_5, HIGH);

 delay(1000);

   //turn on LED L21, L22, L23, L24
  pinMode(ROW_1, OUTPUT);     //row 1 output high
  digitalWrite(ROW_1, HIGH);
  pinMode(ROW_2, OUTPUT);     //row 2 output low
  digitalWrite(ROW_2, LOW);  
  pinMode(ROW_3, OUTPUT);     //row 3 output high
  digitalWrite(ROW_3, HIGH);  
 pinMode(ROW_4, OUTPUT);     //row 4 output high
  digitalWrite(ROW_4, HIGH);  
 pinMode(ROW_5, OUTPUT);     //row 5 output high
  digitalWrite(ROW_5, HIGH);

  delay(1000);

   //turn on LED L31, L32, L33, L34
  pinMode(ROW_1, OUTPUT);     //row 1 output high
  digitalWrite(ROW_1, HIGH);
  pinMode(ROW_2, OUTPUT);     //row 2 output high
  digitalWrite(ROW_2, HIGH);  
  pinMode(ROW_3, OUTPUT);     //row 3 output low
  digitalWrite(ROW_3, LOW);  
 pinMode(ROW_4, OUTPUT);     //row 4 output high
  digitalWrite(ROW_4, HIGH);  
 pinMode(ROW_5, OUTPUT);     //row 5 output high
  digitalWrite(ROW_5, HIGH);

  delay(1000);

   //turn on LED L41, L42, L43, L44
  pinMode(ROW_1, OUTPUT);     //row 1 output high
  digitalWrite(ROW_1, HIGH);
  pinMode(ROW_2, OUTPUT);     //row 2 output high
  digitalWrite(ROW_2, HIGH);  
  pinMode(ROW_3, OUTPUT);     //row 3 output high
  digitalWrite(ROW_3, HIGH);  
 pinMode(ROW_4, OUTPUT);     //row 4 output low
  digitalWrite(ROW_4, LOW);  
 pinMode(ROW_5, OUTPUT);     //row 5 output high
  digitalWrite(ROW_5, HIGH);
  
  delay(1000);

   //turn on LED L51, L52, L53, L54
  pinMode(ROW_1, OUTPUT);     //row 1 output high
  digitalWrite(ROW_1, HIGH);
  pinMode(ROW_2, OUTPUT);     //row 2 output high
  digitalWrite(ROW_2, HIGH);  
  pinMode(ROW_3, OUTPUT);     //row 3 output high
  digitalWrite(ROW_3, HIGH);  
 pinMode(ROW_4, OUTPUT);     //row 4 output high
  digitalWrite(ROW_4, HIGH);
  pinMode(ROW_5, OUTPUT);     //row 5 output low
  digitalWrite(ROW_5, LOW);

    delay(1000);
  }