7-segment block

#include<SPI.h>
#include <Bounce2.h>

#define ZERO  0b11101110
#define ONE   0b10000010
#define TWO   0b11011100
#define THREE 0b11010110
#define FOUR  0b10110010
#define FIVE  0b01110110
#define SIX   0b01111110
#define SEVEN 0b11000010
#define EIGHT 0b11111110
#define NINE  0b11110110
#define DARK  0b00000000

uint8_t digits[] = {ZERO, ONE, TWO, THREE, FOUR, FIVE, SIX, SEVEN, EIGHT, NINE, DARK};
uint8_t brightness = 0;

void setup() {
  Serial.begin(9600);
  randomSeed(analogRead(0));
  
  //Output enable
  pinMode(6, OUTPUT);