I noticed an advert on the TV for a website called http://barclayscodeplayground.co.uk/
There is no explanation what you are doing or why you are doing it. But some users here may like it as it has an animated rainbow; but I will say no more.
One piece of code says “Choose how many scales the fish has:” but you are not adjusting the scales you are adjusting the bones. The setting may be for the amount of bones on each side but even that does not work - in IE anyway.
I suppose it might be interesting for 5 year olds or younger?
Anyone else have an opinion?