void setup() {
pinMode(2, OUTPUT);
pinMode(3, OUTPUT);
pinMode(4, OUTPUT);
pinMode(5, OUTPUT);
pinMode(6, OUTPUT);
pinMode(7, OUTPUT);
pinMode(8, OUTPUT);
}


void loop() {
digitalWrite(2, LOW);
digitalWrite(3, LOW);
digitalWrite(4, LOW);
digitalWrite(5, LOW);
digitalWrite(6, LOW);
digitalWrite(7, LOW);
digitalWrite(8, LOW);

 int x=random(2,8);

 if (x==1) {

  digitalWrite(5, HIGH);
  delay(2000);
 }

else if (x==2) {

digitalWrite(2, HIGH);
digitalWrite(8, HIGH);
delay(2000);

}

 else if (x==3) {

  digitalWrite(2, HIGH);
  digitalWrite(5, HIGH);
  digitalWrite(8, HIGH);
  delay(2000);
}

else if (x==4) {

  digitalWrite(2, HIGH);
  digitalWrite(6, HIGH);
  digitalWrite(4, HIGH);
  digitalWrite(8, HIGH);
  delay(2000);

 }

 else if (x==5) {

  digitalWrite(2, HIGH);
  digitalWrite(6, HIGH);
  digitalWrite(5, HIGH);
  digitalWrite(4, HIGH);
  digitalWrite(8, HIGH);
  delay(2000);
 }

  else (x==6); {
  digitalWrite(2, HIGH);
  digitalWrite(6, HIGH);
  digitalWrite(5, HIGH);
  digitalWrite(4, HIGH);
  digitalWrite(8, HIGH);
  digitalWrite(3, HIGH);
  digitalWrite(7, HIGH);
  delay(2000);
  }