int a=13;
int b=12;
int c=14;
int d=15;
int e=2;
int f=4;
int s1=27;
int s2=26;
int s3=18;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
pinMode(a,OUTPUT);
pinMode(b,OUTPUT);
pinMode(c,OUTPUT);
pinMode(d,OUTPUT);
pinMode(e,OUTPUT);
pinMode(f,OUTPUT);
pinMode(s1,INPUT);
pinMode(s2,INPUT);
pinMode(s3,INPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
  if(s1==1)
  {
    digitalWrite(a,HIGH);digitalWrite(f,HIGH);
    delay(10);
  }
    
    else
   {
    (s1==0);
    digitalWrite(a,LOW);digitalWrite(f,LOW);
    delay(10);
  }
  if(s2==1)
  {
    digitalWrite(b,HIGH);digitalWrite(e,HIGH);
    delay(10);
  } 
  else
  {
    (s2==0);
    digitalWrite(b,LOW); digitalWrite(e,LOW);
    delay(10); 
  }
  if(s3==1)
  {
    digitalWrite(c,HIGH);digitalWrite(d,HIGH);
    delay(10);
  }
else
{
  (s3==0);
  digitalWrite(c,LOW);digitalWrite(d,LOW);
  delay(10);
}
  digitalWrite(a,HIGH);digitalWrite(f,HIGH);
  delay(1000);
  digitalWrite(a,LOW);digitalWrite(f,LOW);
  delay(1000);
  digitalWrite(b,HIGH);digitalWrite(e,HIGH);
  delay(1000);
  digitalWrite(b,LOW); digitalWrite(e,LOW);
  delay(1000);
  digitalWrite(c,HIGH);digitalWrite(d,HIGH);
  delay(1000);
  digitalWrite(c,LOW);digitalWrite(d,LOW);
  delay(1000);
}