int a = 1;
 int b = 2; 
 int c = 3; 
 int d = 4; 
 int e = 5; 
 int f = 6; 
 int g = 7; 

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(){
{
/////cero
digitalWrite(a, LOW);
digitalWrite(b, LOW);
digitalWrite(c, LOW);
digitalWrite(d, LOW);
digitalWrite(e, LOW);
digitalWrite(f, LOW); 
digitalWrite(g, HIGH);
delay(1000); 
}
{
/////Unos
digitalWrite(g, HIGH);
digitalWrite(a, HIGH); 
digitalWrite(f, HIGH);
digitalWrite(d, HIGH);
digitalWrite(e, HIGH);
delay(1000);
}
{
/////Dos 
digitalWrite(f, HIGH);
digitalWrite(c, HIGH);
digitalWrite(a, LOW);
digitalWrite(b, LOW);
digitalWrite(g, LOW);
digitalWrite(d, LOW);
digitalWrite(e, LOW); 
delay(1000);
}
{
/////Tres
digitalWrite(f, HIGH);
digitalWrite(e, HIGH);
digitalWrite(a, LOW);
digitalWrite(b, LOW);
digitalWrite(g, LOW);
digitalWrite(d, LOW);
digitalWrite(c, LOW); 
delay(1000);
}
/////CUATRO}
{
digitalWrite(f, LOW);
digitalWrite(c, LOW);
digitalWrite(a, HIGH);
digitalWrite(b, LOW);
digitalWrite(g, LOW);
digitalWrite(d, HIGH);
digitalWrite(e, HIGH); 
delay(1000);
}
/////CINCO
{
digitalWrite(a, LOW);
digitalWrite(b, HIGH);
digitalWrite(c, LOW);
digitalWrite(d, LOW);
digitalWrite(g, LOW);
digitalWrite(e, HIGH);
digitalWrite(f, LOW); 
delay(1000);
}
//////siete{
digitalWrite(a, LOW);
digitalWrite(b, LOW);
digitalWrite(c, LOW);
digitalWrite(d, HIGH);
digitalWrite(g, HIGH);
digitalWrite(e, HIGH);
digitalWrite(f, LOW); 
delay(1000);
}