Joomla custom dev - URGENT

Hi, DON'T apply for this job if you don't know doing custom code, this is NOT installing plugin easy project Here is a short description of the job, but we have a doc with printscreens so that you understand better We have joomla articles pages, with 2 plugins for each page : image gallery and background slider. We want you do custom code so that the background slider automatically use same images as the gallery image, so that we do not need edit in 2 plugins Thanks