arduino-unit-4-2

int LEDRpin = 3;
int LEDGpin = 5;
int LEDBpin = 6;

void turn(int r, int g, int b) {
  analogWrite(LEDRpin, r);
  analogWrite(LEDGpin, g);
  analogWrite(LEDBpin, b);
}

void setup() {
  pinMode(LEDRpin, OUTPUT);
  pinMode(LEDGpin, OUTPUT);
  pinMode(LEDBpin, OUTPUT);
  turn(0, 0, 0);
}

void loop() {
  for(int i=0; i<256; i++) 
  { 
    turn(i, i, i); 
    delay(5); 
  } 
  for(int i=255; i>0; i--) {
    turn(i, i, i);
    delay(5);
  }
}