//pin numbers for the segments and dp
int a=1;
int b=2;
int c=3;
int d=4;
int e=5;
int f=6;
int g=7;
int dp=8;

//display number 1
void display1(void) {
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);

}
//display number2
void display2(void) {
  digitalWrite(a, HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(g, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(d, HIGH);

}
void display3(void) {
   digitalWrite(a, HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(g, HIGH);

}
void display4(void) {
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);

}
void display5(void) {
  digitalWrite(a, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);

}
void display6(void) {
  digitalWrite(a, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);

}
void display7(void) {
  digitalWrite(a, HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);

}
void display8(void) {
  digitalWrite(a, HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);


}
void display9(void) {
  digitalWrite(a, HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);

}
void display0(void) {
  digitalWrite(a, HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, HIGH);

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

void setup(){
  int i;
  for(i=1;i<=8;i++){
      pinMode(i, OUTPUT);
  }
}

void loop(){
  while(1){
  clearDisplay();
  display0();
  delay(500);

  clearDisplay();
  display1();
  delay(500);

  clearDisplay();
  display2();
  delay(500);

  clearDisplay();
  display3();
  delay(500);

  clearDisplay();
  display4();
  delay(500);

  clearDisplay();
  display5();
  delay(500);

  clearDisplay();
  display6();
  delay(500);

  clearDisplay();
  display7();
  delay(500);

  clearDisplay();
  display8();
  delay(500);

  clearDisplay();
  display9();
  delay(500);
  }
}