#define A 0
#define B 2
#define C 4
#define D 5
#define E 12
#define F 14
#define G 15

#define a 1
#define b 2
#define c 3
#define d 4
#define e 5
#define f 6
#define g 7
#define h 8
#define i 9
#define j 10
#define k 11
#define l 12
#define m 13
#define n 14
#define o 1
#define p 2
#define q 3
#define r 4
#define s 5
#define t 6
#define u 7
#define v 8
#define w 9
#define x 10
#define y 11
#define z 12


void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Starting....");
  pinMode(A, OUTPUT);
  pinMode(B, OUTPUT);
  pinMode(C, OUTPUT);
  pinMode(D, OUTPUT);
  pinMode(E, OUTPUT);
  pinMode(F, OUTPUT);
  pinMode(G, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
  //0
  digitalWrite(A,LOW);
  digitalWrite(B,LOW);
  digitalWrite(C,LOW);
  digitalWrite(D,LOW);
  digitalWrite(E,LOW);
  digitalWrite(F,LOW);
  digitalWrite(G,LOW);
  delay(500);

  //1
  digitalWrite(A,LOW);
  digitalWrite(B,HIGH);
  digitalWrite(C,HIGH);
  digitalWrite(D,LOW);
  digitalWrite(E,LOW);
  digitalWrite(F,LOW);
  digitalWrite(G,LOW);
  delay(500);

  digitalWrite(A,HIGH);
  digitalWrite(B,LOW);
  digitalWrite(C,LOW);
  digitalWrite(D,HIGH);
  digitalWrite(E,HIGH);
  digitalWrite(F,HIGH);
  digitalWrite(G,HIGH);
  delay(500);

  //2
  digitalWrite(A,HIGH);
  digitalWrite(B,HIGH);
  digitalWrite(C,LOW);
  digitalWrite(D,HIGH);
  digitalWrite(E,HIGH);
  digitalWrite(F,LOW);
  digitalWrite(G,HIGH);
  delay(500);

  //3
  delay(10); // this speeds up the simulation
  digitalWrite(A,HIGH);
  digitalWrite(B,HIGH);
  digitalWrite(C,HIGH);
  digitalWrite(D,HIGH);
  digitalWrite(E,LOW);
  digitalWrite(F,LOW);
  digitalWrite(G,HIGH);
  delay(500);

  //4
  digitalWrite(A,LOW);
  digitalWrite(B,HIGH);
  digitalWrite(C,HIGH);
  digitalWrite(D,LOW);
  digitalWrite(E,LOW);
  digitalWrite(F,HIGH);
  digitalWrite(G,HIGH);
  delay(500);

  //5
  digitalWrite(A,HIGH);
  digitalWrite(B,LOW);
  digitalWrite(C,HIGH);
  digitalWrite(D,HIGH);
  digitalWrite(E,LOW);
  digitalWrite(F,HIGH);
  digitalWrite(G,HIGH);
  delay(500);  

  //6
  digitalWrite(A,HIGH);
  digitalWrite(B,LOW);
  digitalWrite(C,HIGH);
  digitalWrite(D,HIGH);
  digitalWrite(E,HIGH);
  digitalWrite(F,HIGH);
  digitalWrite(G,HIGH);
  delay(500);

  //7
  digitalWrite(A,HIGH);
  digitalWrite(B,HIGH);
  digitalWrite(C,HIGH);
  digitalWrite(D,LOW);
  digitalWrite(E,LOW);
  digitalWrite(F,LOW);
  digitalWrite(G,LOW);
  delay(500);

  //8
  digitalWrite(A,HIGH);
  digitalWrite(B,HIGH);
  digitalWrite(C,HIGH);
  digitalWrite(D,HIGH);
  digitalWrite(E,HIGH);
  digitalWrite(F,HIGH);
  digitalWrite(G,HIGH);
  delay(500);

  //9
  digitalWrite(A,HIGH);
  digitalWrite(B,HIGH);
  digitalWrite(C,HIGH);
  digitalWrite(D,LOW);
  digitalWrite(E,LOW);
  digitalWrite(F,HIGH);
  digitalWrite(G,HIGH);
  delay(500);
  
}