#include <LedControl.h>
LedControl lc = LedControl(3,5,4,1);
byte on = B11111111;
byte off = B00000000;
byte onfirst = B10000000;

void display_x(){
  for(int i = 0; i < 8; i++){
    lc.setLed(0, currentRow(i), i, true);
    lc.setLed(0, currentRow(i), 7-i, true);
  }
}

void display_svat(){
  lc.setRow(0, currentRow(3), on);
  lc.setRow(0, currentRow(4), on);
  lc.setColumn(0, 4, on);
  lc.setColumn(0, 3, on);
}

void setup() {
  // put your setup code here, to run once:
  //lc.shutdown(0, false);
  //lc.setIntensity(0, 0.8);
  //lc.clearDisplay(0);
  //display_svat();
}

int currentRow(int row){
  return 7-row;
}


void loop() {
  // put your main code here, to run repeatedly:
 /*for(int i=0; i < 8; i++){
    lc.setRow(0,currentRow(i),on);
    delay(500);
    lc.setRow(0,currentRow(i),off);
  }
  for(int i = 0; i < 8; i++){
    lc.setLed(0, currentRow(i), i, true);
    delay(1000);
    lc.setLed(0, currentRow(i), i, false);
  }*/
  display_x();
  delay(1000);
  lc.clearDisplay(0);
  delay(1000);
}