[NTG-context] How to use module simpleslides' SideToc

hi, all I want to use simplesides' SideToc wirte a presentation like sample SideToc.pdfhttp://modules.contextgarden.net/dl/t-simpleslides/doc/context/third/simples..., there is some introduction in Simple Slideshttp://modules.contextgarden.net/dl/t-simpleslides/doc/context/third/simples... A Context presentation modulehttp://modules.contextgarden.net/dl/t-simpleslides/doc/context/third/simples..., but no talking about how to set background color in every region. where can I get the tex source of SideToc.pdf, or tell me what should I do? Thanks a lot! BEST REGARDS PengCZ