int i = 1;
void setup() {
  // put your setup code here, to run once:
pinMode(i,OUTPUT);
pinMode(1,OUTPUT);
pinMode(2,OUTPUT);
pinMode(3,OUTPUT);
pinMode(4,OUTPUT);
pinMode(5,OUTPUT);
pinMode(6,OUTPUT);
pinMode(7,OUTPUT);
pinMode(8,OUTPUT);
pinMode(9,OUTPUT);
pinMode(10,OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:


 for (i; i<11; i=i+1) {
  digitalWrite(i,HIGH);
  delay(500);
 }

 int i=1;


 for (i; i<11; i=i+1) {
  digitalWrite(i, LOW);
  

 }

 delay(500);


}