Simple Gimp Plugin

We need simple Gimp plugin It should make modification to all image currently open ( currently = in the moment we press use the plugin ) It should: - open a new layer under the current one and do a gradient with 2 colors on this - open a new layer between the image and gradient and fill it with a certain pattern - do the opacity to 80% of this latest layer - resize image to a certain size - save it with jpg and 90% quality to a certain folder We should so create an interface of pre processing with whicxh we choose: - colors of gradient to apply - direction ( up to down or down to up only ) - size of jpg savings - % of quality of jpg saving - specify folder where to save img plugin may differ a bit with test, but it's 99% with this workflow