This task requires that you have worked with software to create or edit images in SVG formatNo technical skills are required, but of course, and a little bit of design skillsyou need to know how to draw with a computer program (like Inkscape or another SVG/vector graphics software).
Citoid is a service that provides citation information to wikis.
Either improve the existing logo which is not currently being used: https://commons.wikimedia.org/wiki/File:Citoid_logo.svg
OneThe main problem is that logo has is it looks too similar to the current mediawiki logo. So you can edit it, or create a totally new one.
Or create a totally new one.
After you are done, propose the image.
Please submit your proposal as a SVG file by attaching it in https://phabricator.wikimedia.org/T179691 (see the [Phabricator help](https://www.mediawiki.org/wiki/Phabricator/Help) how to create an account and upload files). Once everybody is happy with it, add the logo to the mediawiki page at https://www.mediawiki.org/wiki/Citoid (see https://meta.wikimedia.org/wiki/Help:Editing for help about editing wiki pages).