Make a blood stain wallpaper
Okay this tutorial is going to be much about freehand, you might not be able to do exactly what I do, maybe you cant find the exact same brushes as I do, maybe you just want to do it a bit different, but I will try to guide you through how to make a great look blood stain wallpaper with adobe photoshop.

First we will need to make a gradient to lay as a background on the stage, I just made a simple light blue metallic looking gradient and dragged it across the stage.

Now go to brushes.deviantart.com and find some cool looking blood stain photoshop brushes, (could also be called splatter brushes). When you have collected a small bunch of them, just open them in photoshop to add them to the brush panel.
Now we are ready to draw, select a dark red color and with the different blood stain brushes draw some stains.

not too main with the same brush size and color, change the color to a different red and then change brush size and brush style, its all about variation.



And we are done, remember the keywords, variation, variation, and variation, and maybe even some simplicity, dont overdue it so it looks to filled.