int x;
void setup()
 { for (x=2;x<=9;x++)
 pinMode(x, OUTPUT);
  
}

void loop() {
  //1
 /* for(x=2;x<=9;x++){
    digitalWrite(x,1);
    delay(500);
    digitalWrite(x,0);
  }*/
  //2
  /*
  for(x=2;x<=9;x++){
    digitalWrite(11-x,1);
    delay(500);
    digitalWrite(11-x,0);
  }*/
  /*
   for(x=2;x<=9;x++){
     digitalWrite(x,1);
    digitalWrite(11-x,1);
    delay(500);
    digitalWrite(x,0);
    digitalWrite(11-x,0);
  }*/
}