#include <LedControl.h>

LedControl lc = LedControl(11, 13, 10, 1);
int right = 2;
int left = 4;
int up = 3;
int bottom = 5;
int x = 0, y = 0;

void setup() {
  lc.shutdown(0, false);
  lc.setIntensity(0, 8);
  lc.clearDisplay(0);
}

void loop() {
  if (keys() == 1) {
    x -= 1;
    delay(250);
    lc.setLed(0, x + 1, y, 0);
  }
  else if (keys() == 2) {
    x += 1;
    delay(250);
    lc.setLed(0, x - 1, y, 0);
  }
  else if (keys() == 3) {
    y += 1;
    delay(250);
    lc.setLed(0, y - 1, y, 0);
  }
  else if (keys() == 4) {
    y -= 1;
    delay(250);
    lc.setLed(0, y - 1, y, 0);
  }
  lc.setLed(0, x, y, 1);
}

int keys() {
  if (digitalRead(right)) {
    return 1;
  }
  else if (digitalRead(left)) {
    return 2;
  }
  else if (digitalRead(up)) {
    return 3;
  }
  else if (digitalRead(bottom)) {
    return 4;
  }
  return 0;
}