Fibonacci Sequence

I'm leanin' on a tree limb, lookin' at a leaf
And the branches and the veins have a curious reach
The lengths that they go form a ratio
Like a Nautilus shell in an all-expanding spiral
It's a Fibonacci sequence and it's gone viral

There's no need for caution with a beautiful proportion
For the pattern to be had, all you got to do is add
Two numbers at a time and then you just climb
First a one and a one for a simple little two
One and two are three, two and three are five
Fibonacci repeats in the things that come alive

Pineapples, pine cones, artichokes, ferns
The mighty Fibonacci always returns
Round and round like the petals in a flower

From the shape of a dolphin, to bones in your finger
The Fibonacci sequence knows how to linger