#include "SevSeg.h"
SevSeg sevseg;

#define MAX_NUMBER_STRINGS 12
#define MAX_STRING_SIZE 8
char testStrings[MAX_NUMBER_STRINGS][MAX_STRING_SIZE];

#define PATTERN_CHANGE_TIME 1000
unsigned long timer = millis() - PATTERN_CHANGE_TIME;
byte testStringsPos = 0;

void setup() {
  byte numDigits = 4;
  byte digitPins[] = {2, 3, 4, 5};
  byte segmentPins[] = {6, 7, 8, 9, 10, 11, 12, 13};
  bool resistorsOnSegments = false;
  byte hardwareConfig = COMMON_ANODE; 
  bool updateWithDelays = false;
  bool leadingZeros = false;

  sevseg.begin(hardwareConfig, numDigits, digitPins, segmentPins, resistorsOnSegments, updateWithDelays, leadingZeros);
  sevseg.setBrightness(90);

  strcpy(testStrings[0], "H");
  strcpy(testStrings[1], ".");
  strcpy(testStrings[2], "E");
  strcpy(testStrings[3], "..  ");
  strcpy(testStrings[4], "L ");
  strcpy(testStrings[5], "...");
  strcpy(testStrings[6], "L");
  strcpy(testStrings[7], "....");
  strcpy(testStrings[8], "O");
  strcpy(testStrings[9], ". . .");
  strcpy(testStrings[10], "HI");
  strcpy(testStrings[11], ". . . .");
}

void loop() {

  if (millis() > (timer + PATTERN_CHANGE_TIME)) {
    sevseg.setChars(testStrings[testStringsPos]);
    testStringsPos++;
    if (testStringsPos >= MAX_NUMBER_STRINGS) testStringsPos = 0;
    timer = millis();
  }

  sevseg.refreshDisplay();
}