I have located some background textures and other artwork originaly uploaded to the Net in the DART 1.3 days by Laduca (apologies if I have this wrong).
NOTE: The configurations in the pack use the Minimap as the base anchor. To see them properly your Minimap (I use Chinchilla) will need to be located near the bottom of your screen and in the centre.
It also includes a DiscordArt.lua file with various profiles. Because it is old the profiles are made for smaller screen sizes (900x600 maybe) but with Discord Art they can be resized and repositioned. The 3rd screenshot on the DART page is just that, a modification of the default profile included in this pack.
NOTE: Before making the changes described below save a copy of your [Drive]:\[Programs folder]\World of Warcraft\WTF\Account\[YOUR_ACCOUNT]\SavedVariables\DiscordArt.lua file if it already contains custom information.
To use a configuration:
Before starting the game: copy/paste the DiscordArt.lua file into [Drive]:\[Programs folder]\World of Warcraft\WTF\Account\[YOUR_ACCOUNT]\SavedVariables folder.
Copy the .TGA and .BLP files to your [Drive]:\[Programs folder]\World of Warcraft\Interface\Addons\DiscordArt\CustomTextures folder.
Log on to a character and type /dart, press the "Misc. Options" button (bottom left), select the configuration of your choice from the "Load Profile" drop list and press the "Load" button.
You may also need to adjust/reset the "Updates per Second" to 15-35 (or more depending on your other addon load) for best performance.