const int pinLED1 = 2;
const int pinLED2 = 3;
const int pinLED3 = 4;
const int pinLED4 = 5;
const int pinLED5 = 6;
const int pinLED6 = 7;
const int pinLED7 = 8;
const int pinLED8 = 9;
void setup() 
{
pinMode(pinLED1, OUTPUT);
pinMode(pinLED2, OUTPUT);
pinMode(pinLED3, OUTPUT);
pinMode(pinLED4, OUTPUT);
pinMode(pinLED5, OUTPUT);
pinMode(pinLED6, OUTPUT);
pinMode(pinLED7, OUTPUT);
pinMode(pinLED8, OUTPUT);  
}
void loop()
{
for(int i=0; i<=8; i++)
{
if(i==1){
digitalWrite(pinLED1, LOW);
digitalWrite(pinLED2, LOW);
digitalWrite(pinLED3, LOW);
digitalWrite(pinLED4, LOW);
digitalWrite(pinLED5, LOW);
digitalWrite(pinLED6, LOW);
digitalWrite(pinLED7, LOW);
digitalWrite(pinLED8, HIGH);  
}else if(i==2){
digitalWrite(pinLED1, LOW);
digitalWrite(pinLED2, LOW);
digitalWrite(pinLED3, LOW);
digitalWrite(pinLED4, LOW);
digitalWrite(pinLED5, LOW);
digitalWrite(pinLED6, LOW);
digitalWrite(pinLED7, HIGH);
digitalWrite(pinLED8, LOW);  
}else if(i==3){
digitalWrite(pinLED1, LOW);
digitalWrite(pinLED2, LOW);
digitalWrite(pinLED3, LOW);
digitalWrite(pinLED4, LOW);
digitalWrite(pinLED5, LOW);
digitalWrite(pinLED6, HIGH);
digitalWrite(pinLED7, LOW);
digitalWrite(pinLED8, LOW);
}else if(i==4){
digitalWrite(pinLED1, LOW);
digitalWrite(pinLED2, LOW);
digitalWrite(pinLED3, LOW);
digitalWrite(pinLED4, LOW);
digitalWrite(pinLED5, HIGH);
digitalWrite(pinLED6, LOW);
digitalWrite(pinLED7, LOW);
digitalWrite(pinLED8, LOW);
  }else if(i==5){
digitalWrite(pinLED1, LOW);
digitalWrite(pinLED2, LOW);
digitalWrite(pinLED3, LOW);
digitalWrite(pinLED4, HIGH);
digitalWrite(pinLED5, LOW);
digitalWrite(pinLED6, LOW);
digitalWrite(pinLED7, LOW);
digitalWrite(pinLED8, LOW);
  }else if(i==6){
digitalWrite(pinLED1, LOW);
digitalWrite(pinLED2, LOW);
digitalWrite(pinLED3, HIGH);
digitalWrite(pinLED4, LOW);
digitalWrite(pinLED5, LOW);
digitalWrite(pinLED6, LOW);
digitalWrite(pinLED7, LOW);
digitalWrite(pinLED8, LOW);
  }else if(i==7){
digitalWrite(pinLED1, LOW);
digitalWrite(pinLED2, HIGH);
digitalWrite(pinLED3, LOW);
digitalWrite(pinLED4, LOW);
digitalWrite(pinLED5, LOW);
digitalWrite(pinLED6, LOW);
digitalWrite(pinLED7, LOW);
digitalWrite(pinLED8, LOW);
}else{
digitalWrite(pinLED1, HIGH);
digitalWrite(pinLED2, LOW);
digitalWrite(pinLED3, LOW);
digitalWrite(pinLED4, LOW);
digitalWrite(pinLED5, LOW);
digitalWrite(pinLED6, LOW);
digitalWrite(pinLED7, LOW);
digitalWrite(pinLED8, LOW);
}
delay(1000);
}
}