#include <driver/ledc.h>
// Define LED pins (replace with your actual pin numbers)
const int led_pins[] = {2,3, 4, 5, 6,7,8, 9, 10,11,12,13,14,15,16,17,18,21,33,34,35};  
const int num_leds = 22;
// LEDC channel configuration
const int ledc_channel = 0;
const int freq = 0.005;  // 5 kHz PWM frequency
const int resolution = 32;  // 32-bit resolution
void setup() {
  for (int i = 0; i < num_leds; i++) {
    pinMode(led_pins[i], OUTPUT);
  }

  // Configure LEDC channel
  ledcSetup(ledc_channel, freq, resolution);

  // Attach LED pins to LEDC channel
  for (int i = 0; i < num_leds; i++) {
    ledcAttachPin(led_pins[i], ledc_channel);
 
  }
//delay(1000);

}
void loop() {
  for (int i = 0; i < num_leds; i++) {
    ledcWrite(ledc_channel, 255);  // Turn on LED
   delay(500);  // Delay for visibility
    ledcWrite(ledc_channel, 0);  // Turn off LED
 
  }
  for (int i = num_leds - 1; i >= 0; i--) {
    ledcWrite(ledc_channel, 255);  // Turn on LED
    delay(500);  // Delay for visibility
    ledcWrite(ledc_channel, 0);  // Turn off LED
   }
}