ARDUINO

int led7 = 7;

int led6 = 6;

int led5 = 5;

void setup() {

  // put your setup code here, to run once:

  pinMode(led7,OUTPUT);

  pinMode(led6,OUTPUT);

  pinMode(led5,OUTPUT);

}

void loop() {

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

  digitalWrite(led7,HIGH);

  digitalWrite(led6,LOW);

  digitalWrite(led5,LOW);

  delay(2000);

  digitalWrite(led7,LOW);

  digitalWrite(led6,HIGH);

  digitalWrite(led5,LOW);

  delay(2000);

  digitalWrite(led7,LOW);

  digitalWrite(led6,LOW);

  digitalWrite(led5,HIGH);

  delay(2000);

   digitalWrite(led7,LOW);

  dig italWrite(led6,HIGH);

  digitalWrite(led5,LOW);

  delay(2000);

}