#define RED1 0
#define YELLOW1 2
#define GREEN1 15
#define RED2 5
#define GREEN2 18
#define RED3 23
#define YELLOW3 21
#define GREEN3 22

int segPins[7] = {13, 32, 33, 25, 27, 14, 12};

const byte digits[10][7] = {
  {1,1,1,1,1,1,0}, // 0
  {0,1,1,0,0,0,0}, // 1
  {1,1,0,1,1,0,1}, // 2
  {1,1,1,1,0,0,1}, // 3
  {0,1,1,0,0,1,1}, // 4
  {1,0,1,1,0,1,1}, // 5
  {1,0,1,1,1,1,1}, // 6
  {1,1,1,0,0,0,0}, // 7
  {1,1,1,1,1,1,1}, // 8
  {1,1,1,1,0,1,1}  // 9
};

void displayDigit(int num) {
  for (int k = 0; k < 7; k++) {
    digitalWrite(segPins[k], digits[num][k]);
  }
}

void setup(){
  pinMode(RED1, OUTPUT);
  pinMode(YELLOW1, OUTPUT);
  pinMode(GREEN1, OUTPUT);
  pinMode(RED2, OUTPUT);
  pinMode(GREEN2, OUTPUT);
  pinMode(RED3, OUTPUT);
  pinMode(YELLOW3, OUTPUT);
  pinMode(GREEN3, OUTPUT);

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

void countdown(int seconds) {
  for (int i = seconds; i >= 0; i--) {
    displayDigit(i);
    delay(1000);
  }
}

void loop(){
  digitalWrite(RED1, HIGH);
  digitalWrite(GREEN3, HIGH);
  digitalWrite(GREEN2, HIGH);
  countdown(9);
  digitalWrite(RED1, LOW);
  digitalWrite(GREEN3, LOW);
  digitalWrite(GREEN2, LOW);

  digitalWrite(YELLOW3, HIGH);
  digitalWrite(YELLOW1, HIGH);
  countdown(1);
  digitalWrite(YELLOW3, LOW);
  digitalWrite(YELLOW1, LOW);

  digitalWrite(RED3, HIGH);
  digitalWrite(GREEN1, HIGH);
  digitalWrite(RED2, HIGH);
  countdown(9);
  digitalWrite(RED3, LOW);
  digitalWrite(GREEN1, LOW);
  digitalWrite(RED2, LOW);

  digitalWrite(YELLOW3, HIGH);
  digitalWrite(YELLOW1, HIGH);
  countdown(1);
  digitalWrite(YELLOW3, LOW);
  digitalWrite(YELLOW1, LOW);

}