Background.java

package com.mygdx.game;

import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.math.Vector;
import com.badlogic.gdx.math.Vector2;

public class Background {

    class BGPicture {
        private Texture tx;
        private Vector2 pos;

        public BGPicture(Vector2 pos) {
            tx = new Texture("back.png");
            this.pos = pos;

        }
    }

    private int speed;
    private BGPicture[] backs;

    public Background() {
        speed = 3;
        backs = new BGPicture[2];

        backs[0] = new BGPicture(new Vector2(0, 0));
        backs[1] = new BGPicture(new Vector2(800, 0));
    }

    public void render(SpriteBatch batch) {
        for(int i = 0; i < backs.length; i++) {
            batch.draw(backs[i].tx, backs[i].pos.x, backs[i].pos.y);
        }
    }

    public void update() {
        for(int i = 0; i < backs.length; i++) {
            backs[i].pos.x -= speed;
        }

        if (backs[0].pos.x < -800) {
            backs[0].pos.x = 0;
            backs[1].pos.x = 800;
        }
    }
}