#include <LedControl.h>

LedControl lc = LedControl(11, 13, 10, 1);

#define LEFT_BTN 2
#define RIGHT_BTN 3

void setup() {
  Serial.begin(9600);

  lc.shutdown(0, false);
  lc.setIntensity(0, 8);
  lc.clearDisplay(0);

  pinMode(LEFT_BTN, INPUT_PULLUP);
  pinMode(RIGHT_BTN, INPUT_PULLUP);
}

void loop() {
  lc.clearDisplay(0);

  if (digitalRead(LEFT_BTN) == LOW) {
    lc.setLed(0, 7, 2, true);
    Serial.println("LEFT");
  }

  if (digitalRead(RIGHT_BTN) == LOW) {
    lc.setLed(0, 7, 5, true);
    Serial.println("RIGHT");
  }

  delay(50);
}