#include <AFMotor.h>
#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
  #include <avr/power.h>
#endif

// Connect a stepper motor with 48 steps per revolution (7.5 degree)
// to motor port #2 (M3 and M4)
AF_Stepper motor(48, 1);
Adafruit_NeoPixel left = Adafruit_NeoPixel(12, 9, NEO_GRB + NEO_KHZ800);
Adafruit_NeoPixel right = Adafruit_NeoPixel(12, 10, NEO_GRB + NEO_KHZ800);

void setup() {
  motor.setSpeed(100);  // 10 rpm
  left.begin();
  right.begin();
}

void loop() {
  flashEyes();
  motor.step(300, FORWARD, SINGLE);
  flashEyes();
  motor.step(300, BACKWARD, SINGLE);
  flashEyes();
  motor.step(300, FORWARD, DOUBLE);
  flashEyes();
  motor.step(300, BACKWARD, DOUBLE);
  flashEyes();
  motor.step(300, FORWARD, INTERLEAVE);
  flashEyes();
  motor.step(300, BACKWARD, INTERLEAVE);
  flashEyes();
  motor.step(300, FORWARD, MICROSTEP);
  flashEyes();
  motor.step(300, BACKWARD, MICROSTEP);
  flashEyes();
}

void flashEyes() {
  setRed();
  eyesOff();
  setRed();
  eyesOff();
  setRed();
  eyesOff();
  setRed();
  eyesOff();
  setRed();
}

void setRed() {
 for(int lightLevel=0;lightLevel<255;lightLevel++){
    for(int i=0;i<16;i++){
    left.setPixelColor(i, left.Color(lightLevel,0,0));
    right.setPixelColor(i, right.Color(lightLevel,0,0));
    left.show();
    right.show();
  }
  delay(10);
 }
  delay(200);
}

void eyesOff() {
  for(int lightLevel=255;lightLevel>0;lightLevel--){
    for(int i=0;i<16;i++){
    left.setPixelColor(i, left.Color(lightLevel,0,0));
    right.setPixelColor(i, right.Color(lightLevel,0,0));
    left.show();
    right.show();
  }
  delay(10);
 }
  delay(200);
}