void setup() {
  pinMode(13, OUTPUT);//A
  pinMode(12, OUTPUT);//B 
  pinMode(11, OUTPUT);//C
  pinMode(10, OUTPUT);//D
  pinMode(9, OUTPUT);//E
  pinMode(8, OUTPUT);//F
  pinMode(7, OUTPUT);//G

}
//tampilan angka '2'

void loop() {
  digitalWrite(13,LOW);//A
  digitalWrite(12,LOW);//B
  digitalWrite(11,HIGH);//C
  digitalWrite(10,LOW);//D
  digitalWrite(9,LOW);//E
  digitalWrite(8, HIGH);//F
  digitalWrite(7,LOW);//G
  delay(1000);

  //tampilan angka '3'
  digitalWrite(13,LOW);
  digitalWrite(12,LOW);
  digitalWrite(11, LOW);
  digitalWrite(10, LOW);
  digitalWrite(9, HIGH);
  digitalWrite(8, HIGH);
  digitalWrite(7, LOW);
  delay(1000);

  //tampilan angka '-'
  digitalWrite(13, HIGH);
  digitalWrite(12, HIGH);
  digitalWrite(11, HIGH);
  digitalWrite(10, HIGH);
  digitalWrite(9, HIGH);
  digitalWrite(8, HIGH);
  digitalWrite(7, LOW);
  delay(1000);

  //tampilan angka '0'
  digitalWrite(13, LOW);
  digitalWrite(12, LOW);
  digitalWrite(11,LOW);
  digitalWrite(10, LOW);
  digitalWrite(9, LOW);
  digitalWrite(8, LOW);
  digitalWrite(7, HIGH);
  delay(1000);

  //tampilan angka '6'
  digitalWrite(13, LOW);
  digitalWrite(12, HIGH);
  digitalWrite(11, LOW);
  digitalWrite(10, LOW);
  digitalWrite(9, LOW);
  digitalWrite(8, LOW)
  digitalWrite(7, LOW);
  delay(1000);

  //tampilan angka '-'
  digitalWrite(13, HIGH);
  digitalWrite(12, HIGH);
  digitalWrite(11, HIGH);
  digitalWrite(10, HIGH);
  digitalWrite(9, HIGH);
  digitalWrite(8, HIGH);
  digitalWrite(7, LOW);
  delay(1000)

  //tampilan angka  '2'
  digitalWrite(13, LOW);
  digitalWrite(12, LOW);
  digitalWrite(11, HIGH);
  digitalWrite(10, LOW);
  digitalWrite(9, LOW);
  digitalWrite(8, HIGH);
  digitalWrite(7, LOW);
  delay(1000)

  //tampilan angka '0'
  digitalWrite(13, LOW);
  digitalWrite(12, LOW);
  digitalWrite(11, LOW);
  digitalWrite(10, LOW);
  digitalWrite(9, LOW);
  digitalWrite(8, LOW);
  digitalWrite(7, HIGH);
  delay(1000)

  //tampilan angka '0'
  digitalWrite(13, LOW);
  digitalWrite(12, LOW);
  digitalWrite(11, LOW);
  digitalWrite(11, LOW);
  digitalWrite(10, LOW);
  digitalWrite(9, LOW);
  digitalWrite(8, LOW);
  digitalWrite(7, HIGH);
  delay(1000)

  //tampilan angka '7'
  digitalWrite(13, LOW);
  digitalWrite(12, LOW);
  digitalWrite(11, LOW);
  digitalWrite(10, HIGH);
  digitalWrite(9, HIGH);
  digitalWrite(8, HIGH);
  digitalWrite(7, HIGH);
  delay(1000)
}
mb . 
bb  bc