Algodoo

They are interconnected organisms.
A male and female cell forms an infant Skodwarde. It grows into a mature Skodwarde. At the end of its life, it becomes a breeding Skodwarde, which produces both male and female cells. And the cycle repeats!
Teal ball: male Skodwarde cell
Turquoise ball: female Skodwarde cell
2 X 2 square: infant Skodwarde
4 X 4 square: mature Skodwarde
5 X 5 square: breeding Skodwarde