//We always have to include the library
#include "LedControl.h"

/*
  Now we need a LedControl to work with.
 ***** These pin numbers will probably not work with your hardware *****
  pin 12 is connected to the DataIn
  pin 11 is connected to the CLK
  pin 10 is connected to LOAD
  We have only a single MAX72XX.
*/
LedControl lc = LedControl(12, 11, 10, 1);
int a = 5000;
int b = 599;
int c = 66;
int d = 7;
/* we always wait a bit between updates of the display */
unsigned long delaytime = 250;

void setup() {
  /*
    The MAX72XX is in power-saving mode on startup,
    we have to do a wakeup call
  */
  lc.shutdown(0, false);
  /* Set the brightness to a medium values */
  lc.setIntensity(0, 15);
  /* and clear the display */
  lc.clearDisplay(0);
  Serial.begin(9600);
}


/*
  This method will display the characters for the
  word "Arduino" one after the other on digit 0.
*/


/*
  This method will scroll all the hexa-decimal
  numbers and letters on the display. You will need at least
  four 7-Segment digits. otherwise it won't really look that good.
*/
void scrollDigits() {

  lc.setDigit(0, 3, 4, false);
  lc.setDigit(0, 2, 3, false);
  lc.setDigit(0, 1, 2, false);
  lc.setDigit(0, 0, 1, false);
}
void printNumber(int v) {
  int ones;
  int tens;
  int hundreds;
  int thousand;

  if (v < 0 || v > 9999)
    return;
  ones = v % 10;
  v = v / 10;
  tens = v % 10;
  v = v / 10;
  hundreds = v % 10;
  v = v / 10;
  thousand = v;

  //Now print the number digit by digit
  //lc.setDigit(0,3,(byte)thousand,false);
  if (thousand == 0) {
    lc.setChar(0, 3, ' ', false);
  }
  else {
    lc.setDigit(0, 3, (byte)thousand, false);
  }
  if ((hundreds == 0) && (thousand == 0)) {
    lc.setChar(0, 2, ' ', false);
  }
  else {
    lc.setDigit(0, 2, (byte)hundreds, false);
  }
  if ((tens == 0) && (hundreds == 0) && (thousand == 0)) {
    lc.setChar(0, 1,' ', false);
  }
  else {
    lc.setDigit(0, 1, (byte)tens, false);
  }
  lc.setDigit(0, 0, (byte)ones, false);


}

void loop() {
  //scrollDigits();
  //delay(1000);
  printNumber(a);
  delay(1000);
  printNumber(b);
  delay(1000);
  printNumber(c);
  delay(1000);
  printNumber(d);
  delay(1000);
}