4 DIRECTION TRAFFIC LIGHT

 

                   

                                           

CODE:-

int red1 = 13;

int yellow1 = 12;

int green1 = 11;

int red2 = 10;

int yellow2 = 9;

int green2 = 8;

int red3 = 7;

int yellow3 = 6;

int green3 = 5;

int red4 = 4;

int yellow4 = 3;

int green4 = 2;

void setup()

{

  for(int i = 2; i<=13; i++) {

    pinMode(i, OUTPUT);

  }

}

void loop()

{ 

  direction(red1, yellow1, green1, red2, yellow2, green2, red3, yellow3, green3, red4, yellow4, green4);

  direction(red2, yellow2, green2, red1, yellow1, green1, red3, yellow3, green3, red4, yellow4, green4);

  direction(red3, yellow3, green3, red1, yellow1, green1, red2, yellow2, green2, red4, yellow4, green4);

  direction(red4, yellow4, green4, red1, yellow1, green1, red2, yellow2, green2, red3, yellow3, green3);

}

void direction(int a, int b, int c, int d, int e, int f, int g, int h, int i, int j, int k, int l)

{

  digitalWrite(a, LOW);

  digitalWrite(b, LOW);

  digitalWrite(c, HIGH);

  digitalWrite(d, HIGH);

  digitalWrite(e, LOW);

  digitalWrite(f, LOW);

  digitalWrite(g, HIGH);

  digitalWrite(h, LOW);

  digitalWrite(i, LOW);

  digitalWrite(j, HIGH);

  digitalWrite(k, LOW);

  digitalWrite(l, LOW);

  delay(3000);

  digitalWrite(c, LOW);

  digitalWrite(b, HIGH);

  delay(2500);

}