Instead of brainstorming on corporate whiteboards why not fight crime using a cork board or teach using a blackboard?
Download the backgrounds:
- Cork board: https://www.textures4photoshop.com/tex/wood/corkboard-background-with-seamless-cork-texture.aspx
- Blackboard: https://www.textures4photoshop.com/tex/glass/green-chalkboard-texture-free-download.aspx
Of course, you can use any other image you want.
Copy the images into your assets/storages/ folder (or anywhere else inside your assets folder).
Add this to your custom.css with the appropriate path:
.tl-canvas {
background: url("../assets/storages/corkboard-background-with-seamless-cork-texture.jpg");
background-size: cover;
}
Do not use online images as that would waste bandwidth on both sides.
Have fun!