// Date: 03/12/2025
// Experiment No: 07
// Name: Rajaram Parida
// Redg: 2241016203
// Section: 224101028

//Objective 3

#include <Adafruit_NeoPixel.h>

#define LED_PIN 7
#define NUM_LEDS 10
#define BUTTON_PIN 2

Adafruit_NeoPixel strip(NUM_LEDS, LED_PIN, NEO_GRB + NEO_KHZ800);

int levels[5] = {20, 60, 120, 180, 255};
int indexLevel = 0;
bool lastState = HIGH;

void setup() {
  pinMode(BUTTON_PIN, INPUT_PULLUP);
  strip.begin();
  strip.setBrightness(levels[indexLevel]);
  for(int i = 0; i < NUM_LEDS; i++) strip.setPixelColor(i, strip.Color(255, 255, 255));
  strip.show();
}

void loop() {
  bool state = digitalRead(BUTTON_PIN);
  if(state == LOW && lastState == HIGH) {
    indexLevel = (indexLevel + 1) % 5;
    strip.setBrightness(levels[indexLevel]);
    strip.show();
    delay(250);
  }
  lastState = state;
}