//EFEITO ARCO ÍRIS NO RGB

 //Variaveis
 int led_r = 6; //vermelho
 int led_b = 5; //azul
 int led_g = 3; //verde
 int Pot = 0;
 int pin_Pot = A0;

void setup(){
  pinMode(led_r, OUTPUT);
  pinMode(led_b, OUTPUT);
  pinMode(led_g, OUTPUT);
  pinMode(pin_Pot, INPUT);
}

 void loop(){
  /*Mapear o valor lido no potenciometro 
  no valor de 0 a 1023. O valor 1 a 7 
  referente as 7 cores do arco íris*/
  Pot = map(analogRead(pin_Pot), 0, 1023, 1, 7);
  //Vermelho
  if(Pot == 1){
  analogWrite(led_r, 0);
  analogWrite(led_b, 255);
  analogWrite(led_g, 255);
  }
  //Laranja
  if(Pot == 2){
  analogWrite(led_r, 0);
  analogWrite(led_b, 89);
  analogWrite(led_g, 255);
  }
  //Amarelo
  if(Pot == 3){
  analogWrite(led_r, 0);
  analogWrite(led_b, 0);
  analogWrite(led_g, 255);
  }
  //Verde
  if(Pot == 4){
  analogWrite(led_r, 255);
  analogWrite(led_b, 0);
  analogWrite(led_g, 255);
  }
  //Azul
  if(Pot == 5){
  analogWrite(led_r, 255);
  analogWrite(led_b, 255);
  analogWrite(led_g, 0);
  }
  //Anil
  if(Pot == 6){
  analogWrite(led_r, 182);
  analogWrite(led_b, 255);
  analogWrite(led_g, 0);
  }
  //Violeta
  if(Pot == 7){
  analogWrite(led_r, 0);
  analogWrite(led_b, 255);
  analogWrite(led_g, 46);
  }
 }