#define a   9
#define b   8
#define c   7
#define d   6
#define e   5
#define f   4
#define g   3
#define dp  2


void setup() {
  for(int i = 0; i<=9; i++){
    pinMode(i, OUTPUT);
  }
}

void loop() {
  dispDigit(1,1,1,1,1,1,0,0);
  delay(2000);
  dispDigit(0,1,1,0,0,0,0,0);
  delay(2000);
  dispDigit(1,1,0,1,1,0,1,0);
  delay(2000);
  dispDigit(0,0,0,0,0,0,0,0);
  delay(2000);
}

void dispDigit(int a1,int b1,int c1,int d1,int e1,int f1,int g1,int dp1){
  digitalWrite(a, a1);
  digitalWrite(b, b1);
  digitalWrite(c, c1);
  digitalWrite(d, d1);
  digitalWrite(e, e1);
  digitalWrite(f, f1);
  digitalWrite(g, g1);
  digitalWrite(dp, dp1);
}