How can i create such diamond like bg?

[Elinora]

[PrintDriver]

Buy it for $11

Black and white triangle pattern, background, texture, EPS 10

[StudioMonkey]

. . . or, y’know, draw it out. It’s only triangles. Could even be done in InDesign although Illustrator would be better.
I’ve done similar things and the only difficult part is colouring the individual items.