int btn = 19, btn2 = 5, led = 27, led2 = 14, led3 = 12, poten = 0;
int counter = 0;

void setup() {
  Serial.begin(115200);
  pinMode(btn, INPUT_PULLUP);
  pinMode(btn2, INPUT_PULLUP);
  pinMode(led, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(poten, INPUT);
}

void loop() {

  int potenValue = analogRead(poten);
   Serial.println(counter);

  int btnValue = digitalRead(btn);
  if (btnValue == 0) {
    while (digitalRead(btn) == 0) {}
    counter = counter - 1;
    if (counter < 0 ) {
      counter = 0;
    }
  }
  int btn2Value = digitalRead(btn2);
  if (btn2Value == 0) {
    while (digitalRead(btn2) == 0) {}
    counter = counter + 1;
    if (counter > 3) {
      counter = 3;
    }
  }
  int mappedValue = map(potenValue, 0, 4095, 0, 255);
  if (counter == 1) {
    analogWrite(led, mappedValue);
    analogWrite(led2, 0);
    analogWrite(led3, 0);
  }
    if (counter == 2) {
    analogWrite(led, mappedValue);
    analogWrite(led2, mappedValue);
    analogWrite(led3, 0);
  }
    if (counter == 3) {
    analogWrite(led, mappedValue);
    analogWrite(led2, mappedValue);
    analogWrite(led3, mappedValue);
  }
  if (counter == 0 ) {
    analogWrite(led, 0);
    analogWrite(led2, 0);
    analogWrite(led3, 0);
  }
  delay(100);
}
{
  "version": 1,
  "author": "*02-01-06 ด.ช.ณัฏฐนันท์ เตชะวิบูลย์วงศ์",
  "editor": "wokwi",
  "parts": [
    { "type": "wokwi-breadboard", "id": "bb1", "top": -425.4, "left": -26, "attrs": {} },
    { "type": "board-esp32-devkit-c-v4", "id": "esp", "top": -124.8, "left": 196.84, "attrs": {} },
    {
      "type": "wokwi-led",
      "id": "led1",
      "top": -397.2,
      "left": 205.4,
      "attrs": { "color": "red" }
    },
    {
      "type": "wokwi-led",
      "id": "led2",
      "top": -397.2,
      "left": 243.8,
      "attrs": { "color": "yellow" }
    },
    {
      "type": "wokwi-led",
      "id": "led3",
      "top": -397.2,
      "left": 272.6,
      "attrs": { "color": "blue" }
    },
    {
      "type": "wokwi-pushbutton",
      "id": "btn1",
      "top": -355.3,
      "left": 301.1,
      "rotate": 90,
      "attrs": { "color": "white" }
    },
    {
      "type": "wokwi-pushbutton",
      "id": "btn2",
      "top": -355.3,
      "left": 157.1,
      "rotate": 90,
      "attrs": { "color": "black" }
    },
    { "type": "wokwi-potentiometer", "id": "pot1", "top": -356.5, "left": 383.8, "attrs": {} }
  ],
  "connections": [
    [ "esp:TX", "$serialMonitor:RX", "", [] ],