Thanks Karsten,

>> It's not perfect, but short code:-) <<

No, this really is an elegant solution, and yes the code is amazingly compact.
Is "createRainbow()" a function you wrote for colouring vectors, that you are calling here?
Clever!

>> It's a proposal. Maybe we will find a better solution later. <<

It is true that control of colour spectrum it limited, however there is a lot of ways to manipulate
the output: varying the range input into reRange node and reMapper widget as well as shifting vales with addition/subtraction etc.


Thanks again Karsten, it's brilliant
I'm so grateful for your skills and efforts,
James

PS I have attached here objects2.js with new node to replace existing in extensions folder, for anyone who may be interested.