Step One

First, let's make the wall first. To do that, make a new document with any size.

Step Two

Fill your document with the color #CC0000. Now, go to Filter>Texture>Texturizer and use the settings below:

Graffiti Text

Step Three

Allright, you have your wall now, let's write on your wall. Okay, what you need now is a graffiti font. I will use the font below. You may download it from here.

Graffiti Text

Step Four

Now type anything with a graffiti font go to Layer>Layer Style>Stroke and use the settings below:

Graffiti Text

Step Four

Again, go to Layer>Layer Style>Gradient Overlay and use the settings below:

Graffiti Text