1. Open Adobe Photoshop
2. Create a new document of any size as you want, use white background color.
3. Go to Filter > Texture > Grain and set all the option like below..
Grain Type: Vertical.
4. Now press Ctrl + F (it will repeat the filter effect)
5. Go to Filter > Artistic > Neon Glow and choose the color you want to use (mine is lime green) and use below settings
Glow Size: -24
Glow Brightness: 20.
6.Go to Filter > Stylize > Glowing Edges and use below settings
Edge Width: 1
if you will do everything correctly than you will get a background like below one...