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# Spirals Instead of Sunflowers

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## You may also like

### Fibs

### Paving Paths

### Gnomon Dimensions

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Age 11 to 16

Challenge Level

- Problem

Beginners to LOGO programming may want to start by working through the FIRST FORWARD series of introductory articles before tackling this problem.

Below are some examples of recursion. I had been trying to replicate the spirals within the head of a sunflower!

The program used was:

**TO SUNF :S :A
FD :S RT :A
SUNF :S + 1 :A
END**

You might like to replicate the spirals above by considering suitable values for the variables :S and :A.

The real challenge is to simulate the head of a sunflower with more spirals that are much more tightly packed and look distinctly more 'Fibonacci' in proportion!

The well known Fibonacci sequence is 1 ,1, 2, 3, 5, 8, 13, 21.... How many Fibonacci sequences can you find containing the number 196 as one of the terms?

How many different ways can I lay 10 paving slabs, each 2 foot by 1 foot, to make a path 2 foot wide and 10 foot long from my back door into my garden, without cutting any of the paving slabs?

These gnomons appear to have more than a passing connection with the Fibonacci sequence. This problem ask you to investigate some of these connections.