This is the level of dumb that I approve. You could add a few ways to play with the site on top of your color selection.
You could maybe make a snow effect like in : https://engageinteractive.co.uk/blog/5-modern-snow-effects
Instead of using snow, you would just place different sized dogs. Multiple sites have a snow filter for Christmas celebration but it is a little boring.
You could be making a bouncing (and rotating) dog jpeg would also be very entertaining. It will bounce around the screen and rotate at the same time.