int a=7;
  int b=6;
  int c=5;
  int d=11;
  int e=10;
  int f=8;
  int g=9;
  int dp=4;

void digital_0(void) {
  unsigned char j;
  digitalWrite(e,HIGH);
  digitalWrite(d,HIGH);
  for(j=5;j<=8;j++)
  digitalWrite(j,HIGH);
  digitalWrite(g,LOW);
  digitalWrite(dp,LOW);
}

void digital_1(void) {
  unsigned char j;
  digitalWrite(c,HIGH);
  digitalWrite(b,HIGH);
  for(j=7;j<=11;j++)
  digitalWrite(j,LOW);
  digitalWrite(dp,LOW);
}

void digital_2(void) {
  unsigned char j;
  digitalWrite(b,HIGH);
  digitalWrite(a,HIGH);
  for(j=9;j<=11;j++)
  digitalWrite(j,HIGH);
  digitalWrite(dp,LOW);
  digitalWrite(c,LOW);
  digitalWrite(f,LOW);
}

void digital_3(void) {
  unsigned char j;
  digitalWrite(g,HIGH);
  digitalWrite(d,HIGH);
  for(j=5;j<=7;j++)
  digitalWrite(j,HIGH);
  digitalWrite(dp,LOW);
  digitalWrite(f,LOW);
  digitalWrite(e,LOW);
}

void digital_4(void) {
  digitalWrite(c,HIGH);
  digitalWrite(b,HIGH);
  digitalWrite(f,HIGH);
  digitalWrite(g,HIGH);
  digitalWrite(dp,LOW);
  digitalWrite(a,LOW);
  digitalWrite(e,LOW);
  digitalWrite(d,LOW);
 
}

void digital_5(void) {
  unsigned char j;
  for(j=7;j<=9;j++)
  digitalWrite(j,HIGH);
  digitalWrite(c,HIGH);
  digitalWrite(d,HIGH);
  digitalWrite(dp,LOW);
  digitalWrite(b,LOW);
  digitalWrite(e,LOW);
}

void digital_6(void) {
  unsigned char j;
  for(j=7;j<=11;j++)
  digitalWrite(j,HIGH);
  digitalWrite(c,HIGH);
  digitalWrite(dp,LOW);
  digitalWrite(b,LOW);
}

void digital_7(void) {
  unsigned char j;
  for(j=5;j<=7;j++)
  digitalWrite(j,HIGH);
  digitalWrite(dp,LOW);
  for(j=8;j<=11;j++)
  digitalWrite(j,LOW);
}

void digital_8(void) {
  unsigned char j;
  for(j=5;j<=11;j++)
  digitalWrite(j,HIGH);
  digitalWrite(dp,LOW);
}

void digital_9(void) {
  digitalWrite(a,HIGH);
  digitalWrite(b,HIGH);
  digitalWrite(c,HIGH);
  digitalWrite(d,HIGH);
  digitalWrite(e,LOW);
  digitalWrite(f,HIGH);
  digitalWrite(g,HIGH);
  digitalWrite(dp,LOW);
}

void setup() {
  int i;
  for(i=4;i<=11;i++)
  pinMode(i,OUTPUT);
}

void loop() {
  digital_0();
  delay(1000);
  digital_1();
  delay(1000);
  digital_2();
  delay(1000);
  digital_3();
  delay(1000);
  digital_4();
  delay(1000);
  digital_5();
  delay(1000);
  digital_6();
  delay(1000);
  digital_7();
  delay(1000);
  digital_8();
  delay(1000);
  digital_9();
  delay(1000);

}