How to create background?

Firstly, I want create background with fibers and different nuances of colors. This is some step when I do the background :

Step 1 : Create new page : File > New

Or  to create shortcut new page : Ctrl + N

Step 2 : Go Filter > Rendering > Fibers

Step 3 : You can change the %, variance and strength. Then click OK

After you click OK, you can see the layout like above

Step 4 : Click 2 times on the level for to unlocked it

We go on overlap nuance.
Step 5 : Click 2 times again for open new window. Then click at contour and gradient overlay

Step 6 : Now we choose the color and click OK

Step 7 : The method fusion it must be normal and you must decrease the opicity

Lastly, the layout become like above