Photoshop learning - How to make a background like squares patterned

In this simple lesson we will learn how to make the background like squares and patterned


- Open Photoshop Program and make new ,with any dimensions and with any resolution .... press the button "D" to bring the colors in black and white case .....  then make a clouds filter





-Then apply the wave filter






-set the values as followed




-then apply the "Differenca clouds" filter as followed



-so the design will be like that: