#define A 23
#define B 22
#define C 21
#define D 18
#define E 17
#define F 0
#define G 15
void setup()
{
  pinMode(A,OUTPUT);
  pinMode(B,OUTPUT);
  pinMode(C,OUTPUT);
  pinMode(D,OUTPUT);
  pinMode(E,OUTPUT);
  pinMode(F,OUTPUT);
  pinMode(G,OUTPUT);
}
void loop(){
digitalWrite(A,LOW);
digitalWrite(B,LOW);
digitalWrite(C,LOW);
digitalWrite(D,LOW);
digitalWrite(E,LOW);
digitalWrite(F,LOW);
digitalWrite(G,HIGH);
delay(900);



digitalWrite(A,HIGH);
digitalWrite(B,LOW);
digitalWrite(C,LOW);
digitalWrite(D,HIGH);
digitalWrite(E,HIGH);
digitalWrite(F,HIGH);
digitalWrite(G,HIGH);
delay(900);


digitalWrite(A,LOW);
digitalWrite(B,LOW);
digitalWrite(C,HIGH);
digitalWrite(D,LOW);
digitalWrite(E,LOW);
digitalWrite(F,HIGH);
digitalWrite(G,LOW);
delay(900);

digitalWrite(A,LOW);
digitalWrite(B,LOW);
digitalWrite(C,LOW);
digitalWrite(D,LOW);
digitalWrite(E,HIGH);
digitalWrite(F,HIGH);
digitalWrite(G,LOW);
delay(900);


digitalWrite(A,HIGH);
digitalWrite(B,LOW);
digitalWrite(C,LOW);
digitalWrite(D,HIGH);
digitalWrite(E,HIGH);
digitalWrite(F,LOW);
digitalWrite(G,LOW);
delay(900);

digitalWrite(A,LOW);
digitalWrite(B,HIGH);
digitalWrite(C,LOW);
digitalWrite(D,LOW);
digitalWrite(E,HIGH);
digitalWrite(F,LOW);
digitalWrite(G,LOW);
delay(900);


digitalWrite(A,HIGH);
digitalWrite(B,HIGH);
digitalWrite(C,LOW);
digitalWrite(D,LOW);
digitalWrite(E,LOW);
digitalWrite(F,LOW);
digitalWrite(G,LOW);
delay(900);

digitalWrite(A,LOW);
digitalWrite(B,LOW);
digitalWrite(C,LOW);
digitalWrite(D,HIGH);
digitalWrite(E,HIGH);
digitalWrite(F,HIGH);
digitalWrite(G,HIGH);
delay(900);


digitalWrite(A,LOW);
digitalWrite(B,LOW);
digitalWrite(C,LOW);
digitalWrite(D,LOW);
digitalWrite(E,LOW);
digitalWrite(F,LOW);
digitalWrite(G,LOW);
delay(900);

digitalWrite(A,LOW);
digitalWrite(B,LOW);
digitalWrite(C,LOW);
digitalWrite(D,HIGH);
digitalWrite(E,HIGH);
digitalWrite(F,LOW);
digitalWrite(G,LOW);
delay(900);
}