It's my first attempt of using Fibonacci sequence to create a flower.
The petals form a golden spiral and several spirals form a flower. In the customizer, a larger
spirals makes the petals density higher, and a larger
petals_per_spiral generates a bigger flower.
After generating or downloading a STL here, scale up it to the size that your printer can print the smallest petal.
The printed thing here, for example, were enlarged to a scale of 1:3.5.