#define REDPIN 5
#define GREENPIN 6
#define BLUEPIN 3

void setup() {
  pinMode(REDPIN, OUTPUT);
  pinMode(GREENPIN, OUTPUT);
  pinMode(BLUEPIN, OUTPUT);
}


void loop() {
    analogWrite(REDPIN, 255);
    analogWrite(BLUEPIN, 0);
    analogWrite(GREENPIN, 0);
}