Firs contribution for Hacktoberfest

For my first contribution I chose quite a simple issue. All I had to do after forking the repo is to download a logo and make that same logo just for different screen sizes that were mentioned in the issue. I used Photoshop to make various sizes of the logo and once they were all done I submitted a pull request. I think that for my next issue I will try to choose something more related to JavaScript of Python.