int Led1=11;
int Led2=12;
int Led3=13;
int Led4=8;
int Led5=9;
int Led6=10;
int Led7=5;
int Led8=6;
int Led9=7;

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 (Led6,HIGH);
digitalWrite (Led8,HIGH);
delay (5000);
digitalWrite (Led1,LOW);
digitalWrite (Led6,LOW);
digitalWrite (Led8,LOW);
digitalWrite (Led2,HIGH);
digitalWrite (Led4,HIGH);
digitalWrite (Led9,HIGH);
delay (5000);
digitalWrite (Led2,LOW);
digitalWrite (Led4,LOW);
digitalWrite (Led9,LOW);
digitalWrite (Led7,HIGH);
digitalWrite (Led5,HIGH);
digitalWrite (Led3,HIGH);
delay (5000);
digitalWrite (Led7,LOW);
digitalWrite (Led5,LOW);
digitalWrite (Led3,LOW);

}