#include <DIYables_4Digit7Segment_74HC595.h> // DIYables_4Digit7Segment_74HC595 library

#define SCLK  27  // The Arduino pin connected to SCLK
#define RCLK  26  // The Arduino pin connected to RCLK
#define DIO   15 // The Arduino pin connected to DIO

DIYables_4Digit7Segment_74HC595 display(SCLK, RCLK, DIO);
int num = 0;
void setup() {
  Serial.begin(9600);
}

void loop() {

  numk(num);
  num = num + 2;

}

void numk(int nums) {
  display.printInt(num, false);
  display.loop();
}