/**"Hi, this is ankush and this is a mini project
which demonstrate the working of traffic light,
4 Way Intersection with 2 Phase Traffic Light Signals of a crossROAD      **/      

#define phase_1_green 33
#define phase_1_yellow 32
#define phase_1_red 25
#define phase_2_green 17
#define phase_2_yellow 5
#define phase_2_red 18

int cycletime = 11;    // Cycle time in seconds
int yellow = 2;        // Yellow light duration in seconds
float greenratio = 0.5;
int greentot, greenphase1, greenphase2;

void setup() {
  delay(5000);  // Delay for 5 seconds to allow time for boot log to be processed
  pinMode(phase_1_green, OUTPUT);
  pinMode(phase_1_yellow, OUTPUT);
  pinMode(phase_1_red, OUTPUT);
  pinMode(phase_2_green, OUTPUT);
  pinMode(phase_2_yellow, OUTPUT);
  pinMode(phase_2_red, OUTPUT);

  cycletime *= 1000;  // Convert cycle time to milliseconds
  yellow *= 1000;     // Convert yellow light duration to milliseconds
  greentot = cycletime - (yellow * 2); // Total green light time for both phases
  greenphase1 = greenratio * greentot; // Green light duration for phase 1
  greenphase2 = greentot - greenphase1; // Green light duration for phase 2
}

void loop() {
  // Phase 1: Green light on, Phase 2: Red light on
  digitalWrite(phase_1_green, HIGH);
  digitalWrite(phase_1_red, LOW);
  digitalWrite(phase_2_red, HIGH);
  delay(greenphase1);

  // Phase 1: Yellow light on, Green light off
  digitalWrite(phase_1_green, LOW);
  digitalWrite(phase_1_yellow, HIGH);
  delay(yellow);

  // Phase 1: Yellow light off, Red light on
  digitalWrite(phase_1_yellow, LOW);
  digitalWrite(phase_1_red, HIGH);

  // Phase 2: Green light on, Phase 1: Red light on
  digitalWrite(phase_2_green, HIGH);
  digitalWrite(phase_1_red,HIGH);
  digitalWrite(phase_2_red, LOW);
  delay(greenphase2);

  // Phase 2: Yellow light on, Green light off
  digitalWrite(phase_2_green, LOW);
  digitalWrite(phase_2_yellow, HIGH);
  delay(yellow);

  // Phase 2: Yellow light off, Red light on
  digitalWrite(phase_2_yellow, LOW);
  digitalWrite(phase_2_red, HIGH);
}