int a=0; 
  int b=1;
  int c=2;
  int d=3;
  int e=4;
  int f=5;
  int g=6; 
void setup() {

}
void loop() {


 zero();
 
}
void zero(){ 
  digitalWrite(a, 1);
    digitalWrite(b, 1);
      digitalWrite(c , 1);
        digitalWrite(e , 1);
         digitalWrite(f , 1);
          digitalWrite(g , 1);
}
void one(){ 
  digitalWrite(4 , 1);
    digitalWrite(5 , 1);
      digitalWrite(6, 1);
        digitalWrite(7 , 1);
 }
void zero0(){ 
  digitalWrite(0 , 0);
    digitalWrite(1, 0);
      digitalWrite(2 ,0);
        digitalWrite(3 ,0);
      
}
void a3000(){ 
  digitalWrite(4 , 0);
    digitalWrite(5 ,0);
      digitalWrite(6,0);
        digitalWrite(7 , 0);
}