Speaking of ideas for drawings throughout the year, the heart of the photo above is definitely a permanent feature. The red heart on the dark background also gives the design a bold appearance. Although you can make a neutral color with the heart to keep it more modern. And placing a large heart pattern in the middle of the wall would allow it to be a focal point.
You do not have to just stick to the bathroom for that idea either. You can also place a modern heart pattern in a kitchen backsplash. Hearts could even go on the floor tiles. This is a very versatile option, if you are open to a more complex remodeling project.