arduino-unit-4-3

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

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

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