用arduino ide开发，用光敏电阻控制ws2512灯带（调用fastled库内的函数控制灯带），灯带初始状态下亮蓝灯，光敏电阻阻值＞600时，灯光改变为红色。光敏电阻输入口为a1，a2，a3，灯带输出口为a4，a5，a6，每条灯带初始亮30个灯，并使用millis进行多任务处理，计算光敏电阻在120000ms内感应到物体（阻值＞600）的次数，感应次数越多，灯带亮起的灯数量越少。12000ms过后，计数归0，灯带亮起数量回归初始值30个，请直接给出代码

以下是用Arduino IDE开发，使用光敏电阻控制WS2812灯带的代码：

#include <FastLED.h>

#define LED_PIN     4
#define NUM_LEDS    30

CRGB leds[NUM_LEDS];

#define PHOTO_RESISTOR_1 A1
#define PHOTO_RESISTOR_2 A2
#define PHOTO_RESISTOR_3 A3

unsigned long previousMillis = 0;
const long interval = 120000; // 120 seconds
int count = 0;

void setup() {
  FastLED.addLeds<WS2812, LED_PIN, GRB>(leds, NUM_LEDS);
  pinMode(PHOTO_RESISTOR_1, INPUT);
  pinMode(PHOTO_RESISTOR_2, INPUT);
  pinMode(PHOTO_RESISTOR_3, INPUT);
  for(int i = 0; i < NUM_LEDS; i++) {
    leds[i] = CRGB(0, 0, 255); // initial color: blue
  }
  FastLED.show();
}

void loop() {
  unsigned long currentMillis = millis();

  if(currentMillis - previousMillis >= interval) {
    // reset count and turn on all LEDs
    count = 0;
    for(int i = 0; i < NUM_LEDS; i++) {
      leds[i] = CRGB(0, 0, 255); // blue
    }
  } else {
    // check light sensor values and adjust LED color and brightness
    int sensorValue1 = analogRead(PHOTO_RESISTOR_1);
    int sensorValue2 = analogRead(PHOTO_RESISTOR_2);
    int sensorValue3 = analogRead(PHOTO_RESISTOR_3);

    if(sensorValue1 > 600 || sensorValue2 > 600 || sensorValue3 > 600) {
      // increment count if light sensor detects object
      count++;
      if(count > 10) {
        // decrease LED brightness if object detected more than 10 times
        int brightness = map(count, 10, 120, NUM_LEDS, 0);
        for(int i = 0; i < NUM_LEDS; i++) {
          if(i < brightness) {
            leds[i] = CRGB(255, 0, 0); // red
          } else {
            leds[i] = CRGB(0, 0, 0); // off
          }
        }
      } else {
        // turn on all LEDs in blue color
        for(int i = 0; i < NUM_LEDS; i++) {
          leds[i] = CRGB(0, 0, 255); // blue
        }
      }
    } else {
      // turn on all LEDs in blue color
      for(int i = 0; i < NUM_LEDS; i++) {
        leds[i] = CRGB(0, 0, 255); // blue
      }
    }
  }

  FastLED.show();
}