/*
  This Arduino program cycles through three lighting patterns
  using two single-color LEDs, two RGB LEDs and a 6-segment LED bar graph.
  
  Pattern details:
  
  State 1 (2 seconds):
    - led1 ON, led2 OFF.
    - rgb1 displays red (R=255, G=0, B=0), rgb2 OFF.
    - Bar graph: segments A1, A2, A3 ON, A4, A5, A6 OFF.
    
  State 2 (2 seconds):
    - led1 OFF, led2 ON.
    - rgb2 displays green (R=0, G=255, B=0), rgb1 OFF.
    - Bar graph: segments A4, A5, A6 ON, A1, A2, A3 OFF.
    
  State 3 (2 seconds):
    - Both led1 and led2 ON.
    - Both rgb1 and rgb2 display cyan (G=255, B=255; red off).
    - Bar graph: all six segments ON.
  
  All components are off on start.
*/

const int led1Pin = 30;
const int led2Pin = 31;

// rgb1 pins
const int rgb1_R = 2;
const int rgb1_G = 3;
const int rgb1_B = 4;

// rgb2 pins
const int rgb2_R = 5;
const int rgb2_G = 6;
const int rgb2_B = 7;

// Bar graph segment pins (anodes)
const int barSegPins[6] = {22, 23, 24, 25, 26, 27};

void setup() {
  // Initialize single-color LED pins
  pinMode(led1Pin, OUTPUT);
  pinMode(led2Pin, OUTPUT);
  
  // Initialize RGB LED pins
  pinMode(rgb1_R, OUTPUT);
  pinMode(rgb1_G, OUTPUT);
  pinMode(rgb1_B, OUTPUT);
  
  pinMode(rgb2_R, OUTPUT);
  pinMode(rgb2_G, OUTPUT);
  pinMode(rgb2_B, OUTPUT);
  
  // Initialize bar graph segment pins
  for (int i = 0; i < 6; i++) {
    pinMode(barSegPins[i], OUTPUT);
  }
  
  // Initialization: All components off
  digitalWrite(led1Pin, LOW);
  digitalWrite(led2Pin, LOW);
  
  // Turn off RGB LEDs (using analogWrite since PWM is available)
  analogWrite(rgb1_R, 0);
  analogWrite(rgb1_G, 0);
  analogWrite(rgb1_B, 0);
  
  analogWrite(rgb2_R, 0);
  analogWrite(rgb2_G, 0);
  analogWrite(rgb2_B, 0);
  
  // Turn off all bar graph segments
  for (int i = 0; i < 6; i++) {
    digitalWrite(barSegPins[i], LOW);
  }
}

void loop() {
  // State 1: 2 seconds
  // New state: led1 ON, led2 OFF.
  digitalWrite(led1Pin, HIGH);
  digitalWrite(led2Pin, LOW);
  
  // rgb1: red, rgb2: off
  analogWrite(rgb1_R, 255);  // red full brightness
  analogWrite(rgb1_G, 0);
  analogWrite(rgb1_B, 0);
  
  analogWrite(rgb2_R, 0);
  analogWrite(rgb2_G, 0);
  analogWrite(rgb2_B, 0);
  
  // Bar graph: first three segments (A1, A2, A3) ON, rest OFF.
  for (int i = 0; i < 3; i++) {
    digitalWrite(barSegPins[i], HIGH);
  }
  for (int i = 3; i < 6; i++) {
    digitalWrite(barSegPins[i], LOW);
  }
  
  delay(2000); // Wait for 2 seconds
  
  // State 2: 2 seconds
  // New state: led1 OFF, led2 ON.
  digitalWrite(led1Pin, LOW);
  digitalWrite(led2Pin, HIGH);
  
  // rgb1: off, rgb2: green.
  analogWrite(rgb1_R, 0);
  analogWrite(rgb1_G, 0);
  analogWrite(rgb1_B, 0);
  
  analogWrite(rgb2_R, 0);
  analogWrite(rgb2_G, 255);  // green full brightness
  analogWrite(rgb2_B, 0);
  
  // Bar graph: last three segments (A4, A5, A6) ON, first three OFF.
  for (int i = 0; i < 3; i++) {
    digitalWrite(barSegPins[i], LOW);
  }
  for (int i = 3; i < 6; i++) {
    digitalWrite(barSegPins[i], HIGH);
  }
  
  delay(2000); // Wait for 2 seconds
  
  // State 3: 2 seconds
  // New state: both led1 and led2 ON.
  digitalWrite(led1Pin, HIGH);
  digitalWrite(led2Pin, HIGH);
  
  // Both rgb1 and rgb2: display cyan (green + blue, red off).
  analogWrite(rgb1_R, 0);
  analogWrite(rgb1_G, 255);
  analogWrite(rgb1_B, 255);
  
  analogWrite(rgb2_R, 0);
  analogWrite(rgb2_G, 255);
  analogWrite(rgb2_B, 255);
  
  // Bar graph: all six segments ON.
  for (int i = 0; i < 6; i++) {
    digitalWrite(barSegPins[i], HIGH);
  }
  
  delay(2000); // Wait for 2 seconds
}