int dataPin = 5; 
int clockPin = 7;  
int latchPin = 6;  
int carYellow = 11;
int carGreen = 10;
int pedGreen = 8;
int carRed = 12; 
int pedRed = 9; 
int crossTimeSec = 11; 
int cartime = 30000;
int variable;


unsigned long changeTime; 
void setup() {
  pinMode(dataPin, OUTPUT);
  pinMode(clockPin, OUTPUT);
  pinMode(latchPin, OUTPUT);
  pinMode(carYellow, OUTPUT);
  pinMode(carGreen, OUTPUT);
  pinMode(pedGreen, OUTPUT);
  pinMode(carRed, OUTPUT); 
  pinMode(pedRed, OUTPUT);
  digitalWrite(carGreen, HIGH);
  digitalWrite(pedRed, HIGH);
}

int pattern = 0b11111111;
int digitPattern[10] = {0b00000011,0b10011111,0b00100101,0b00001101,0b10011001,
                        0b01001001,0b01000001,0b00011111,0b00000001,0b00001001};
void changeLights(){
  digitalWrite(carGreen, LOW); 
  digitalWrite(carYellow, HIGH);
  delay(2000);
  digitalWrite(carYellow, LOW);
  digitalWrite(carRed, HIGH);
  delay(2000);
  digitalWrite(pedRed, LOW);
  digitalWrite(pedGreen, HIGH);
  for (int p =crossTimeSec; p >= 0;p--){
    num(p);
    if (p>5){
      delay(2000);
    }else{
      digitalWrite(pedGreen, HIGH);
      delay(250);
      digitalWrite(pedGreen, LOW);
      delay(250);
      digitalWrite(pedGreen, HIGH);
      delay(250);
      digitalWrite(pedGreen, LOW);
      delay(250);
    }
  }
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, LSBFIRST, pattern);
  digitalWrite(latchPin, HIGH);
  // turn ped red on
  digitalWrite(pedRed, HIGH);
  delay(1000);
  digitalWrite(carYellow, HIGH);
  digitalWrite(carRed, LOW);
  delay(1000);
  digitalWrite(carGreen, HIGH);
  digitalWrite(carYellow, LOW);
  changeTime = millis();
}

void loop() {
    changeLights();
  }

void num(int variable){
  if (variable < 10){
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, LSBFIRST, digitPattern[variable]);
  digitalWrite(latchPin, HIGH);
  }else{
    digitalWrite(latchPin, LOW);
    shiftOut(dataPin, clockPin, LSBFIRST, 0b11111110);
    digitalWrite(latchPin, HIGH);
  }
}