int led = 2;
int led2 = 19;
int led3 = 16;
int pot1 = 34;
int pot2 = 33;
int pot3 = 35;

void setup() 
{
  pinMode(led, OUTPUT);
}

void loop() 
{ 
  // variavel da leitura dos POTENCIOMETROS
  int potvalue = analogRead(pot1);
  int potvalue1 = analogRead(pot2);
  int potvalue2 = analogRead(pot3);
  
  // especificando o valor para os POTENCIOMETROS
  int r=map(potvalue,0,4095,0,256); 
  int g=map(potvalue1,0,4095,0,256); 
  int b=map(potvalue2,0,4095,0,256); 
  
  // LEITURA DOS PINOS
  analogWrite(led, r);
  delay(20);

  analogWrite(led2, g);
  delay(20);

  analogWrite(led3, b);
  delay(20);
}