void setup() {
  
  pinMode(23,OUTPUT); 
  pinMode(22, OUTPUT);
  pinMode(21, OUTPUT);
  
  pinMode(29,OUTPUT); 
  pinMode(27, OUTPUT);
  pinMode(25, OUTPUT);
  
  pinMode(53,OUTPUT); 
  pinMode(51, OUTPUT);
  pinMode(49, OUTPUT);
  
}
void loop()
{ digitalWrite(23,1); 
  digitalWrite(25,1);
  digitalWrite(49,1);
  delay(5000);
  digitalWrite(23,0);
  digitalWrite(22,1);
  delay(2000);
  digitalWrite(22,0); 
  digitalWrite(21,1);
  digitalWrite(25,0);
  digitalWrite(29,1); 
  digitalWrite(49,1);
  delay(5000);
  digitalWrite(29,0);
  digitalWrite(27,1);
  delay(2000);
  digitalWrite(27,0); 
  digitalWrite(49,0);
  digitalWrite(53,1); 
  digitalWrite(25,1);
  digitalWrite(21,1);
  delay(5000);
  digitalWrite(53,0);
  digitalWrite(51,1);
  delay(2000);
  digitalWrite(51,0); 
  digitalWrite(21,0); 
 
}