And just thought, there is a great amount of different chains for example

sea chain:

https://www.google.com/search?q=%D1%86%D0%B5%D0%BF%D1%8C+%D0%BC%D0%BE%D1%80%D1%81%D0%BA%D0%B0%D1%8F&source=lnms&tbm=isch&sa=X&ei=EeT8Ub3sKYaJOMu6gdgH&ved=0CAkQ_AUoAQ&biw=1097&bih=559

Or jewelry chain

https://www.google.com/search?q=google&source=lnms&tbm=isch&sa=X&ei=wOX8UeWqBoiPO-a0gegH&ved=0CAkQ_AUoAQ&biw=1097&bih=559#tbm=isch&q=chain+jewelry&spell=1&sa=X&ei=xuX8UdK0JYavO53ygKgI&ved=0CEwQvwUoAA&bav=on.2,or.r_cp.r_qf.&bvm=bv.50165853%2Cd.ZWU%2Cpv.xjs.s.en_US.seW1cfrvSKg.O&fp=9b5cd291079d5d4a&biw=1097&bih=559

You have to talk to programmer to make it more complicated if you want have universal script not just basic chain.