#include <MD_MAX72xx.h>

#define dataPin 2
#define csPin 3
#define clkPin 4
#define mod GENERIC_HW
#define hoch 10
#define runter 11
#define links 12
#define rechts 13
MD_MAX72XX mx = MD_MAX72XX (MD_MAX72XX::mod, dataPin, clkPin, csPin, 1);

int x,y;

void setup() {
  pinMode(dataPin, OUTPUT);
  pinMode(clkPin, OUTPUT);
  pinMode(csPin, OUTPUT);
  pinMode(hoch, INPUT_PULLUP);
  pinMode(runter, INPUT_PULLUP);
  pinMode(links, INPUT_PULLUP);
  pinMode(rechts, INPUT_PULLUP);

  x=0,y=0;
  mx.begin();
}

void loop() {
  //LEDon();
  //LEDoff();
  links_rechts();
}

void LEDon() {
  for(x=0;x<8;x++) {
    for(y=0;y<8;y++) {
      mx.setPoint (y, x, 1);
      delay(100);
    }
  }
}

void LEDoff() {
  for(x=7;x>-1;x--) {
    for(y=7;y>-1;y--) {
      mx.setPoint (y, x, 0);
      delay(100);
    }
  }
}

void links_rechts(){
  mx.setPoint (x, y, 0);
  if(digitalRead(links)){
    x++;
    if(x>8){
      x=8;
    }
  }
  if(digitalRead(rechts)){
    x--;
    if(x<0){
      x=0;
    }
  }
  if(digitalRead(hoch)){
    y++;
    if(y>8){
      y=8;
    }
  }
  if(digitalRead(runter)){
    y--;
    if(y<0){
      y=0;
    }
  }
  mx.setPoint (x, y, 1);
  delay(100);
}