#include <Binary.h> 
#include <Sprite.h> 
#include <Matrix.h> 
 
Matrix myMatrix = Matrix(2, 3, 4); 
 
/* create a new Sprite instance 
   8 pixels wide, 4 pixels tall 
*/ 
Sprite wave = Sprite( 
  8, 4, 
  B00011000, 
  B00100100, 
  B01000010, 
  B10000001 
); 
 
Sprite stripe = Sprite( 
  8, 8, 
  B11100000, 
  B01110000, 
  B00111000, 
  B00011100,
  B00001110,
  B00000111,
  B10000011,
  B11000001
  
); 

Sprite box = Sprite( 
  6, 6, 
  B111111, 
  B100001, 
  B100001, 
  B100001,
  B100001,
  B111111
  
); 

Sprite checker = Sprite( 
  8, 4, 
  B11001100, 
  B11001100, 
  B00110011, 
  B00110011 
); 

int x;
int y;
int b;
int offset;
int rxPin = 8;
int speed = 50;

Sprite s = wave;

void setup() 
{ 
  Serial.begin(9600);
  pinMode(8, OUTPUT);
  myMatrix.clear();
}

void loop() 
{ 
  // Read in the next available byte and blink the rx LED once
  if(Serial.available() > 0){
    b = Serial.read();
    blink(rxPin, 1, 5);
  

  // Subtract 48 to convert ASCII char to right integer ("1" = 49)

  switch (b) {
    case 43: // +
      speed = speed + 20;
      Serial.print("SPEED: "); Serial.println(speed);
      break;
    case 45: // -
      if(speed >= 20) {
      speed = speed - 20; }
      Serial.print("SPEED: "); Serial.print(speed);
      break;
    case 48: // 0
      speed = 50;
      break;
    case 49:
      s = wave;
      break;
      // break is optional
    case 50:
      s = stripe;
      break;
    case 51:
      s = box;
      break;
    case 52:
      s = checker;
      break;
    default: 
      s = wave;
    }
    b = 0;
  }
  offset = (8 - s.height())/2;  
  myMatrix.write(x, offset, s);     // place sprite on screen 
  myMatrix.write(x - 8, offset, s); // place sprite again, elsewhere on screen 
  delay(speed);                      // wait a little bit 
  myMatrix.clear();               // clear the screen for next animation frame 
  if(x == 8)                      // if reached end of animation sequence 
  { 
    x = 0;                        // start from beginning 
  } 
  x++;                            // advance x coordinate to the right 
} 

void blink(int pin, int count, int ms) {
  int x;
  for(x = 0; x < count; x++) {
      digitalWrite(pin, HIGH);
      delay(ms);
      digitalWrite(pin, LOW);
      delay(ms);
  }
}