Red-n-Black

There we go~

For the anime fans with some red and black:

Step 1: Right Click the Raw Button
Step 2: Click Save As 
Step 3: Wins Save to %appdata%\betterdiscord\themes\ 
Step 3: Macs Save to ~/Library/Preferences/themes 
Step 4: Make sure the extension is .theme.css
Step 5: Restart Discord
Step 6: Open Discord Settings>BetterDiscord>Themes>Enable theme

To change the pics, just add the code below in the Custome CSS tab of the BetterDiscord settings:

( Be sure to add the s after http when you change the pic or it won't appear )

/*First Background*/

.app {
    background-image: url("https://i.imgur.com/P0k3VRY.jpg") !important;
    background-size: 1500px 900px !important;
    background-repeat: no-repeat !important;
}

/*Second Background*/

.callout-backdrop {
    opacity:0.9 !important;
    background: url(https://i.imgur.com/CcntY8Y.jpg) !important;
    background-size: 1500px 900px !important;
    background-repeat: no-repeat !important;
}