int pinPot = A0;
int pinLed1 = 6, pinLed2 = 9, pinLed3 = 10, pinLed4 = 11;
int pwmPot, pwmLed1, pwmLed2, pwmLed3, pwmLed4;
int state;

void setup() {
  Serial.begin(9600);
  pinMode(pinLed1, OUTPUT);
  pinMode(pinLed2, OUTPUT);
  pinMode(pinLed3, OUTPUT);
  pinMode(pinLed4, OUTPUT);
}

void loop() {
  analogWrite(pinLed1, pwmLed1);
  analogWrite(pinLed2, pwmLed2);
  analogWrite(pinLed3, pwmLed3);
  analogWrite(pinLed4, pwmLed4);
  Serial.println("PWM LED : ");
  Serial.print(pwmLed1);Serial.print("|");
  Serial.print(pwmLed2);Serial.print("|");
  Serial.print(pwmLed3);Serial.print("|");
  Serial.println(pwmLed4);

  //PROGRAM SWITCH CASE MENGATUR TERANG LED
  pwmPot = analogRead(pinPot);
  switch(state){
    case 0: //Kondisi Awal
      pwmLed1 = pwmPot;
      if(pwmLed1 >= 255) {
        pwmLed1 = 255;
        state = 1;
      }
      break;
      
    case 1: //Kondisi Kedua
      pwmLed2 = pwmPot - 255;
      if(pwmLed2 <= 0){
        pwmLed2 = 0;
        state = 0;
      }
      else if(pwmLed2 >= 255){
        pwmLed2 = 255;
        state = 2;
      }
      break;
      
    case 2:
      pwmLed3 = pwmPot - 510;
      if(pwmLed3 <= 0){
        pwmLed3 = 0;
        state = 1;
      }
      else if(pwmLed3 >= 255){
        pwmLed3 = 255;
        state = 3;
      }
      break;
    case 3:
      pwmLed4 = pwmPot - 765;
      if(pwmLed4 <= 0){
        pwmLed4 = 0;
        state = 2;  
      }
      else if(pwmLed4 >= 255 || pwmPot >= 1023){
        pwmLed4 = 255;
      }
    
  }
}