#define A 4
#define B 23
#define C 21
#define D 19
#define G 22
#define E 18
#define F 2
#define dp 27
//working IOs of ESP32 ------> 2, 4, 16, 17, 18, 19, 21, 22, 23, 25, 26, 27, 32 ,33

int segments[7] = {A,B,C,D,E,F,G};
void setup() {

  for(int i = 0; i<7; i++){
    pinMode(segments[i], OUTPUT);
  }
}

void displayNum(int num) {
  const bool segmentStates[16][7] = {
    {0, 0, 0, 0, 0, 0, 1}, // 0
    {1, 0, 0, 1, 1, 1, 1}, // 1
    {0, 0, 1, 0, 0, 1, 0}, // 2
    {0, 0, 0, 0, 1, 1, 0}, // 3
    {1, 0, 0, 1, 1, 0, 0}, // 4
    {0, 1, 0, 0, 1, 0, 0}, // 5
    {0, 1, 0, 0, 0, 0, 0}, // 6
    {0, 0, 0, 1, 1, 1, 1}, // 7
    {0, 0, 0, 0, 0, 0, 0}, // 8
    {0, 0, 0, 0, 1, 0, 0}, // 9
    {0, 0, 0, 1, 0, 0, 0}, // 10 (A)
    {1, 1, 0, 0, 0, 0, 0}, // 11 (B)
    {0, 1, 1, 0, 0, 0, 1}, // 12 (C)
    {0, 0, 0, 0, 0, 1, 0}, // 13 (D)
    {0, 1, 1, 0, 0, 0, 0}, // 14 (E)
    {0, 1, 1, 1, 0, 0, 0}  // 15 (F)
  };


  for(int i = 0; i<7; i++){
    digitalWrite(segments[i], segmentStates[num][i]);
  }
}

void loop() {
  for(int i = 0; i<16; i++){
    displayNum(i);
    delay(800);
  }
}