Worked on this for awhile. It took some time figuring out how everything worked.

int led13 = 13;  //sets variables for the sketch

int led12 = 12;

int led11 = 11;

int led10 = 10;

int led9 = 9;

 

void setup() {

  pinMode(led13, OUTPUT); //intalizes digital pins 9-13 as outputs

  pinMode(led12, OUTPUT);

  pinMode(led11, OUTPUT);

  pinMode(led10, OUTPUT);

  pinMode(led9, OUTPUT);

}

 

  void loop()

  {

    digitalWrite(led13, HIGH);// turn LED#13 on

    digitalWrite(led11, HIGH);//turn LED#11 on 

    digitalWrite(led9, HIGH);//turn LED#9 on

    delay(500); //wait for half a second

   

    digitalWrite(led13, LOW);//turn LED#13 off

    digitalWrite(led11, LOW);//turn LED#11 off

    digitalWrite(led9, LOW);//turn LED#9 off

    digitalWrite(led12, HIGH);//turn LED#12 on

    digitalWrite(led10, HIGH);//turn LED#10 on

    delay(500);//wait for half a second

   

    digitalWrite(led12, LOW);//turn LED#12 off

    digitalWrite(led10, LOW);//turn LED#10 off 

    digitalWrite(led13, HIGH);//turn LED#13 on

    digitalWrite(led11, HIGH);//turn LED#11 on

    digitalWrite(led9, HIGH);//turn LED#9 on

    delay(500);//wait for half a second

   

    digitalWrite(led13, LOW);//turn LED#13 off

    digitalWrite(led11, LOW);//turn LED#11 off

    digitalWrite(led9, LOW);//turn LED#9 off

    digitalWrite(led12, HIGH);//turn LED#12 on

    digitalWrite(led10, HIGH);//turnLED#10 on

    delay(500);//wait for half a second

   

    digitalWrite(led12, LOW);//turn LED#12 off

    digitalWrite(led10, LOW);//turn LED#10 off

    delay(500);//wait for half a second

   

    digitalWrite(led13, LOW);//turn LED#13 off

    digitalWrite(led12, LOW);//turn LED#12 off

    digitalWrite(led11, LOW);//turn LED#11 off

    digitalWrite(led10, LOW);//turn LED#10 off

    digitalWrite(led9, LOW);//turn LED#9 off

    delay(500);//wait for half a second

   

    digitalWrite(led13, HIGH);//turn LED#13 on

    digitalWrite(led12, HIGH);//turn LED#12 on

    digitalWrite(led11, HIGH);//turn LED#11 on

    digitalWrite(led10, HIGH);//turn LED#10 on

    digitalWrite(led9, HIGH);//turn LED#9 on

    delay(500);//wait for half a second

   

    digitalWrite(led13, LOW);//turn LED#13 off

    digitalWrite(led12, LOW);//turn LED#12 off

    digitalWrite(led11, LOW);//turn LED#11 off

    digitalWrite(led10, LOW);//turn LED#10 off

    digitalWrite(led9, LOW);//turn LED#9 off

    delay(500);//wait for half a second

  }