Thank you guys, I managed to solve the problem by doing exactly what @trollwarrior1 said. Both of answers helped me that I improved knowledge about the problem. Thanks again. But I have one more question so I wont open new thread for that I will just ask here.
It is about antialiasing or "smoothing", when I was programming in pure Java with no engines like libGDX I just set rendering hints to Graphics2D to smooth lines,text,shapes and Java done its job beuatiful
But on libGDX I could not find anything usefull all what I found on internet and tried it, it makes situation worse. Is there any easy or little harder way to get desired smooth effect. Because without smoothing lines,it looks very ugly.