I made a pattern and then used it here, you can find that pattern in my gallery, it is a .pat file for Photoshop
If you want to do it yourself: 1- Make a hexagon. 2- Make 6 more copies of that same hexagon. 3- Open this file [link] and position them in the same way they fit inside the delimited rectangle, you have to select the area inside the rectangle and make the pattern of that selection. 4- Enjoy.
If you do, notice me and I'll remove it.
If you want to do it yourself:
1- Make a hexagon.
2- Make 6 more copies of that same hexagon.
3- Open this file [link] and position them in the same way they fit inside the delimited rectangle, you have to select the area inside the rectangle and make the pattern of that selection.
4- Enjoy.
Hope you could understand