// Arduino Two Way/Pole Traffic Light Control System 

// Traffic light one
int red1 = 13;
int yellow1 = 12;
int green1 = 11;

// Traffic light two
int red2 = 10;
int yellow2 = 9;
int green2 = 8;

void setup () {
// Traffic light one
pinMode (red1, OUTPUT);
pinMode (yellow1, OUTPUT);
pinMode (green1, OUTPUT);

// Traffic light two
pinMode (red2, OUTPUT);
pinMode (yellow2, OUTPUT);
pinMode (green2, OUTPUT);
}

void loop () {
// turns on red1 and grren2
digitalWrite(red1, HIGH);
digitalWrite(green2, HIGH);
delay(10000);

// turns off grren2 and turns on red1 and yellow2
digitalWrite(green2, LOW);
digitalWrite(red1, HIGH);
digitalWrite(yellow2, HIGH);
delay(4000);

// turns off red1 and yellow2 and turns on green1 and red2
digitalWrite(red1, LOW);
digitalWrite(yellow2, LOW);
digitalWrite(green1, HIGH);
digitalWrite(red2, HIGH);
delay(10000);

// turns off green1 and turns on yellow1 and red2
digitalWrite(green1, LOW);
digitalWrite(yellow1, HIGH);
digitalWrite(red2, HIGH);
delay(4000);

// turns off yellow1 and red2
digitalWrite(yellow1, LOW);
digitalWrite(red2, LOW);
}