int ledone = 2;
int ledtwo = 4;
int ledthree= 5;
int ledfour = 18;
int ledfive = 19;
int ledsix = 21;
int ledseven = 22;
int ledeight = 23;
int lednine= 12;
int ledten = 13;
int ledeleven = 14 ;
int ledtwelve = 27;
int ledthirteen = 26;
int ledfourteen = 25;
int ledfifteen = 33;
int ledsixteen = 32;

void setup(){
  pinMode(ledone, OUTPUT);
  pinMode(ledtwo, OUTPUT);
  pinMode(ledthree, OUTPUT);
  pinMode(ledfour, OUTPUT);
  pinMode(ledfive, OUTPUT);
  pinMode(ledsix, OUTPUT);
  pinMode(ledseven, OUTPUT);
  pinMode(ledeight, OUTPUT);
  pinMode(lednine, OUTPUT);
  pinMode(ledten, OUTPUT);
  pinMode(ledeleven, OUTPUT);
  pinMode(ledtwelve, OUTPUT);
  pinMode(ledthirteen, OUTPUT);
  pinMode(ledfourteen, OUTPUT);
  pinMode(ledfifteen, OUTPUT);
  pinMode(ledsixteen, OUTPUT);

}

void loop(){
  digitalWrite(ledone, HIGH); 
  delay(1000);
  digitalWrite(ledone, LOW);
  delay(1000);
  digitalWrite(ledtwo, HIGH);
  delay(1000);
  digitalWrite(ledtwo, LOW);
  delay(1000);
  digitalWrite(ledthree, HIGH);
  delay(1000);
  digitalWrite(ledthree, LOW);
  delay(1000);
  digitalWrite(ledfour, HIGH);
  delay(1000);
  digitalWrite(ledfour, LOW);
  delay(1000);
  digitalWrite(ledeight, HIGH); 
  delay(1000);
  digitalWrite(ledeight, LOW);
  delay(1000);
  digitalWrite(ledtwelve, HIGH);
  delay(1000);
  digitalWrite(ledtwelve, LOW);
  delay(1000);
  digitalWrite(ledsixteen, HIGH);
  delay(1000);
  digitalWrite(ledsixteen, LOW);
  delay(1000);
  digitalWrite(ledfifteen, HIGH);
  delay(1000);
  digitalWrite(ledfifteen, LOW);
  delay(1000);
  digitalWrite(ledfourteen, HIGH); 
  delay(1000);
  digitalWrite(ledfourteen, LOW);
  delay(1000);
  digitalWrite(ledthirteen, HIGH);
  delay(1000);
  digitalWrite(ledthirteen, LOW);
  delay(1000);
  digitalWrite(lednine, HIGH);
  delay(1000);
  digitalWrite(lednine, LOW);
  delay(1000);
  digitalWrite(ledfive, HIGH);
  delay(1000);
  digitalWrite(ledfive, LOW);
  delay(1000);
  digitalWrite(ledsix, HIGH); 
  delay(1000);
  digitalWrite(ledsix, LOW);
  delay(1000);
  digitalWrite(ledseven, HIGH);
  delay(1000);
  digitalWrite(ledseven, LOW);
  delay(1000);
  digitalWrite(ledeleven, HIGH);
  delay(1000);
  digitalWrite(ledeleven, LOW);
  delay(1000);
  digitalWrite(ledten, HIGH);
  delay(1000);
  digitalWrite(ledten, LOW);
  delay(1000);

  digitalWrite(ledten, HIGH); 
  delay(1000);
  digitalWrite(ledten, LOW);
  delay(1000);
  digitalWrite(ledeleven, HIGH);
  delay(1000);
  digitalWrite(ledeleven, LOW);
  delay(1000);
  digitalWrite(ledseven, HIGH);
  delay(1000);
  digitalWrite(ledseven, LOW);
  delay(1000);
  digitalWrite(ledsix, HIGH);
  delay(1000);
  digitalWrite(ledsix, LOW); 
  delay(1000);
  digitalWrite(ledfive, HIGH);
  delay(1000);
  digitalWrite(ledfive, LOW);
  delay(1000);
  digitalWrite(lednine, HIGH);
  delay(1000);
  digitalWrite(lednine, LOW);
  delay(1000);
  digitalWrite(ledthirteen, HIGH);
  delay(1000);
  digitalWrite(ledthirteen, LOW);
  delay(1000);
  digitalWrite(ledfourteen, HIGH);
  delay(1000);
  digitalWrite(ledfourteen, LOW); 
  delay(1000);
  digitalWrite(ledfifteen, HIGH);
  delay(1000);
  digitalWrite(ledfifteen, LOW);
  delay(1000);
  digitalWrite(ledsixteen, HIGH);
  delay(1000);
  digitalWrite(ledsixteen, LOW);
  delay(1000);
  digitalWrite(ledtwelve, HIGH);
  delay(1000);
  digitalWrite(ledtwelve, LOW);
  delay(1000);
  digitalWrite(ledeight, HIGH);
  delay(1000);
  digitalWrite(ledeight, LOW);
  delay(1000);
  digitalWrite(ledfour, HIGH); 
  delay(1000);
  digitalWrite(ledfour, LOW);
  delay(1000);
  digitalWrite(ledthree, HIGH);
  delay(1000);
  digitalWrite(ledthree, LOW);
  delay(1000);
  digitalWrite(ledtwo, HIGH);
  delay(1000);
  digitalWrite(ledtwo, LOW);
  delay(1000);
  digitalWrite(ledone, HIGH);
  delay(1000);
  digitalWrite(ledone, LOW);
  delay(1000);
}