void setup() {
  // put your setup code here, to run once:
pinMode(0, OUTPUT);//A
pinMode(1, OUTPUT);//B
pinMode(2, OUTPUT);//C
pinMode(3, OUTPUT);//D
pinMode(4, OUTPUT);//E
pinMode(5, OUTPUT);//F
pinMode(6, OUTPUT);//G
}

void loop() {
//show the number 2 (ABGED)
digitalWrite(0, HIGH);
digitalWrite(1, HIGH);
digitalWrite(2, LOW);
digitalWrite(3, HIGH);
digitalWrite(4, HIGH);
digitalWrite(5, LOW);
digitalWrite(6, HIGH);
}