Here are the attributions for the background images in `background_samples/`.

- beach2: [Beach in Pagudpud, Ilocos Norte, Philippines]() by John Ryan Cordova from Philippines. (Creative Commons Attribution-Share Alike 2.0 Generic license)
- field1: [Pelto Kärkölässä](https://sq.m.wikipedia.org/wiki/Skeda:Field_in_K%C3%A4rk%C3%B6l%C3%A4.jpg) by Okko Pyykkö
(Creative Commons Attribution 2.0 Generic license)
- forest1: [Photo](https://pxhere.com/en/photo/945157) on Pxhere (CC0 license).
- grass1: [A LOT OF GREEN GRASS ON THE GROUND](https://pixy.org/4783081/) by Anne Fonda (CC0 Public Domain license).
- ocean1: [Dead calm at sea](https://www.flickr.com/photos/gaelvaroquaux/34212317084) by Gael Varoquaux (CC BY 2.0 Generic license).
- ocean3: [okyanus-deniz-sonsuz-doğa-yaz](https://pixabay.com/tr/photos/okyanus-deniz-sonsuz-do%C4%9Fa-yaz-3264052/) by TeeFarm (Pixabay license).
- mountains_blue_sky: [Pink Flowers Near Mountain Covered by Snow](https://www.pexels.com/photo/landscape-nature-night-relaxation-36478/) by Pixabay (CC0 license).
- sky1: [Blue Skies](https://www.pexels.com/photo/nature-sky-clouds-blue-53594/) by Pixabay (CC0 license).