Knight rider light using arduino uno board

Source code

const int LED1 = 2;

const int LED2 = 3;

const int LED3 = 4;

const int LED4 = 5;

const int LED5 = 6;

const int LED6 = 7;

const int LED7 = 8;

const int LED8 = 9;

const int LED9 = 10;

void setup() {

  pinMode(LED1, OUTPUT);

  pinMode(LED2, OUTPUT);

  pinMode(LED3, OUTPUT);

  pinMode(LED4, OUTPUT);

  pinMode(LED5, OUTPUT);

  pinMode(LED6, OUTPUT);

  pinMode(LED7, OUTPUT);

  pinMode(LED8,OUTPUT);

  pinMode(LED9,OUTPUT);

  

}

void loop() {

  digitalWrite(LED1, HIGH);

  digitalWrite(LED2, HIGH);

  delay(50);

  digitalWrite(LED1, LOW);

  digitalWrite(LED2, LOW);

  delay(50);

  digitalWrite(LED2, HIGH);

  digitalWrite(LED3, HIGH);

  delay(50);

  digitalWrite(LED2, LOW);

   digitalWrite(LED3, LOW);

  delay(50);

  digitalWrite(LED3, HIGH);

  digitalWrite(LED4, HIGH);

  delay(50);

  digitalWrite(LED3, LOW);

  digitalWrite(LED4, LOW);

  delay(50);

  digitalWrite(LED4, HIGH);

   digitalWrite(LED5, HIGH);

  delay(50);

  digitalWrite(LED4, LOW);

   digitalWrite(LED5, LOW);

   delay(50);

 digitalWrite(LED5, HIGH);

  digitalWrite(LED6, HIGH);

  delay(50);

  digitalWrite(LED5, LOW);

   digitalWrite(LED6, LOW);

  delay(50);

  digitalWrite(LED6, HIGH);

   digitalWrite(LED7, HIGH);

  delay(50);

  digitalWrite(LED6, LOW);

   digitalWrite(LED7, LOW);

  delay(50);

  digitalWrite(LED7, HIGH);

   digitalWrite(LED8, HIGH);

  delay(50);

  digitalWrite(LED7, LOW);

   digitalWrite(LED8, LOW);

  delay(50);

  digitalWrite(LED8, HIGH);

   digitalWrite(LED9, HIGH);

  delay(50);

  digitalWrite(LED8, LOW);

   digitalWrite(LED9, LOW);

  delay(50);

  digitalWrite(LED9, HIGH);

  delay(50);

  digitalWrite(LED9, LOW);

  delay(50);

  digitalWrite(LED9, HIGH);

  digitalWrite(LED8, HIGH);

  delay(50);

  digitalWrite(LED9, LOW);

  digitalWrite(LED8, LOW);

  delay(50);

   digitalWrite(LED8, HIGH);

   digitalWrite(LED7, HIGH);

  delay(50);

  digitalWrite(LED8, LOW);

  digitalWrite(LED7, LOW);

  delay(50);

  digitalWrite(LED7, HIGH);

  digitalWrite(LED6, HIGH);

  delay(50);

  digitalWrite(LED7, LOW);

  digitalWrite(LED6, LOW);

  delay(50);

  digitalWrite(LED6, HIGH);

  digitalWrite(LED5, HIGH);

  delay(50);

  digitalWrite(LED6, LOW);

  digitalWrite(LED5, LOW);

  delay(50);

  digitalWrite(LED5, HIGH);

  digitalWrite(LED4, HIGH);

  delay(50);

  digitalWrite(LED5, LOW);

  digitalWrite(LED4, LOW);

  delay(50);

  digitalWrite(LED4, HIGH);

  digitalWrite(LED3, HIGH);

  delay(50);

  digitalWrite(LED4, LOW);

  digitalWrite(LED3, LOW);

   delay(50);

   digitalWrite(LED3, HIGH);

   digitalWrite(LED2, HIGH);

  delay(50);

  digitalWrite(LED3, LOW);

  digitalWrite(LED2, LOW);

  delay(50);

   digitalWrite(LED2, HIGH);

  digitalWrite(LED1, HIGH);

  delay(50);

   digitalWrite(LED2, LOW);

  digitalWrite(LED1, LOW);

  delay(50);

  digitalWrite(LED1, HIGH);

  delay(50);

  digitalWrite(LED1, LOW);

  delay(50);

   digitalWrite(LED1, HIGH);

  digitalWrite(LED2, HIGH);

  delay(50);

   digitalWrite(LED1, LOW);

  digitalWrite(LED2, LOW);

  delay(50);

  // put your main code here, to run repeatedly:

}