#define BLUE 11
#define RED 10
#define GREEN 9
#define BUTTON 7

#define OFFSET 2.0943951023931953 // 2/3 PI

int val = 0;

int state = 1;
int pressed = 0;

void setup() {
  pinMode(BLUE, OUTPUT);
  pinMode(RED, OUTPUT);
  pinMode(GREEN, OUTPUT);
  pinMode(BUTTON, INPUT);
}

void loop() {
  if (digitalRead(BUTTON)) {
    if (!pressed) {
      state = 1 - state;
      pressed = 1;
    delay(10);
    }
  } else {
    if (pressed) {
      pressed = 0;
    delay(10);
    }
  }
  delay(1);

  if (state) {
    double t = millis() / 5000.0;
    analogWrite(RED, (sin(t) + 1) * 30);
    t -= OFFSET;
    analogWrite(GREEN, (sin(t) + 1) * 30);
    t -= OFFSET;
    analogWrite(BLUE, (sin(t) + 1) * 8); // Blue is bad for sleep, so tone it down.
  } else {
    analogWrite(RED, 0);
    analogWrite(GREEN, 0);
    analogWrite(BLUE, 0);
  }

}