Made in Inkscape.
Just a pond in three flavours:

Water Lily:

Link to 5k version: https://i.postimg.cc/DyYQZFxq/Water-Lily-5k.png

Blue Pond:

Link to 5k version of Blue Pond: https://i.postimg.cc/pddpnnyr/Blue-Pond-5k.png

Dark Pond:

Link to 5k version of Dark Pond: https://i.postimg.cc/SQgvpnzd/Dark-Pond-5k.png

Link to the gallery at postimage.org: https://postimg.cc/gallery/1g5hi70p8/