#define RED_PIN A5     # GPIO 26
#define GREEN_PIN A1   # GPIO 25
#define BLUE_PIN A0    # GPIO 4

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");

  // Initialize the LED pins as output
  pinMode(RED_PIN, OUTPUT);
  pinMode(GREEN_PIN, OUTPUT); 
  pinMode(BLUE_PIN, OUTPUT);  
}

void loop() {
  // generate random values between 0 and 255 for each color
  int blueValue = random(0, 256); 
  int greenValue = random(0, 256);
  int redValue = random(0, 256);

  // set the LED colors
  // invert value since it's common anode
  analogWrite(, 255 - blueValue); 
  analogWrite(25, 255 - greenValue); 
  analogWrite(4, 255 - redValue);

  delay(1000); // wait one second before changing the colour
}