/*
Name: Indervir Rai
Program Name: Light chaser
Date: 2025-02-28
Program full description: This program show the change of the LED's turning
on and off in certain patterns.
*/



int redLED = 13; // the red LED is connected to pin 13
int yellowLED = 12; // the yellow LED is connected to pin 12
int greenLED = 11; // the green LED is connected to pin 11

int buttonPIN = 8; // the button is connected to pin 8


int patternNumber = 0;
int patternDelay = 100;  



void setup() {
  pinMode (redLED, OUTPUT); // sets red pin to output
  pinMode (yellowLED, OUTPUT); // sets yellow pin to output
  pinMode (greenLED, OUTPUT); // sets green pin to output

  Serial.begin(9600);

  pinMode( buttonPIN, INPUT_PULLUP); /* sets pin to high voltage, and will
                                      go to a low voltage when pressed*/

}

void loop() {

  int buttonVa1 = digitalRead(buttonPIN); // read state of button

  if (patternNumber == 0) //
  {
    digitalWrite(redLED, LOW);
    digitalWrite(yellowLED, LOW);
    digitalWrite(greenLED, HIGH);
    delay(patternDelay);
    digitalWrite(redLED, LOW);
    digitalWrite(yellowLED, HIGH);
    digitalWrite(greenLED, HIGH);
    delay(patternDelay);
    digitalWrite(redLED, HIGH);
    digitalWrite(yellowLED, HIGH);
    digitalWrite(greenLED, HIGH);
    delay(patternDelay);
  } // closes pattern 0
  else if (patternNumber == 1) //
  {
    digitalWrite(redLED, HIGH);
    digitalWrite(yellowLED, HIGH);
    digitalWrite(greenLED, LOW);
    delay(patternDelay);
    digitalWrite(redLED, HIGH);
    digitalWrite(yellowLED, LOW);
    digitalWrite(greenLED, HIGH);
    delay(patternDelay);
    digitalWrite(redLED, LOW);
    digitalWrite(yellowLED, HIGH);
    digitalWrite(greenLED, HIGH);
    delay(patternDelay);
  } // close pattern 1
  else if (patternNumber == 2) //
  {
    digitalWrite(redLED, HIGH);
    digitalWrite(yellowLED, LOW);
    digitalWrite(greenLED, LOW);
    delay(patternDelay);
    digitalWrite(redLED, LOW);
    digitalWrite(yellowLED, HIGH);
    digitalWrite(greenLED, LOW);
    delay(patternDelay);
    digitalWrite(redLED, LOW);
    digitalWrite(yellowLED, LOW);
    digitalWrite(greenLED, HIGH);
    delay(patternDelay);
  } // close pattern 2
    else if (patternNumber == 3) //
  {
    digitalWrite(redLED, HIGH);
    digitalWrite(yellowLED, LOW);
    digitalWrite(greenLED, LOW);
    delay(patternDelay);
    digitalWrite(redLED, HIGH);
    digitalWrite(yellowLED, HIGH);
    digitalWrite(greenLED, LOW);
    delay(patternDelay);
    digitalWrite(redLED, HIGH);
    digitalWrite(yellowLED, HIGH);
    digitalWrite(greenLED, HIGH);
    delay(patternDelay);
  } // close pattern 3
    else if (patternNumber == 4) //
  {
    digitalWrite(redLED, LOW);
    digitalWrite(yellowLED, HIGH);
    digitalWrite(greenLED, HIGH);
    delay(patternDelay);
    digitalWrite(redLED, HIGH);
    digitalWrite(yellowLED, LOW);
    digitalWrite(greenLED, HIGH);
    delay(patternDelay);
    digitalWrite(redLED, HIGH);
    digitalWrite(yellowLED, HIGH);
    digitalWrite(greenLED, LOW);
    delay(patternDelay);
  } // close pattern 4
    else if (patternNumber == 5) //
  {
    digitalWrite(redLED, LOW);
    digitalWrite(yellowLED, LOW);
    digitalWrite(greenLED, HIGH);
    delay(patternDelay);
    digitalWrite(redLED, LOW);
    digitalWrite(yellowLED, HIGH);
    digitalWrite(greenLED, LOW);
    delay(patternDelay);
    digitalWrite(redLED, HIGH);
    digitalWrite(yellowLED, LOW);
    digitalWrite(greenLED, LOW);
    delay(patternDelay);
  } // closes pattern 5

  if (buttonVa1 == LOW);
  {
  patternNumber = patternNumber +1;
  } // closes the pattern number increasing by 1 each time the button is pressed

  if (patternNumber == 6)
  {
    patternNumber = patternNumber - 6;
  } // closes the pattern number going back to 0 once the button reaches 6 presses
}