#include <LedControl.h>

LedControl dotMatrix = LedControl(12, 11, 10, 1); 
int i;


byte emptyHeart[8] = {
  B00000000,
  B00000000,
  B00000000,
  B00000000,
  B00000000,
  B00000000,
  B00000000,
  B00000000
};


byte fullHeart[8] = {
  B01100110,
  B11111111,
  B11111111,
  B11111111,
  B01111110,
  B00111100,
  B00011000,
  B00000000
};

void setup() {
  dotMatrix.shutdown(0, false);  
  dotMatrix.setIntensity(0, 8);   
  dotMatrix.clearDisplay(0);      
}
void loop() {
  
  for (i = 0; i < 8; i++) {
    dotMatrix.setRow(0, i, emptyHeart[i]);  
    delay(500);
  }


  for (i = 0; i < 8; i++) {
    dotMatrix.setRow(0, i, fullHeart[i]);  
    delay(500);
  }
}