Advice sought about precise customisation of tie stripes

Hello. I wonder if anyone can provide some advice. I am using Fancy Product Designer (jquery) to set up a tool where users can design their own tie, with high levels of customisation. One thing we want to do is allow users to adjust the width and colour of individual stripes on the tie. Having experimented with the system, I can't see a way to do this. Can I ask if anyone is aware of a way to do this? Has anyone seen anything similar being done before with Fancy Product Designer? Many thanks