Update README.md
Fix URL for gallary
PyElastica is the python implementation of **Elastica**: an *open-source* project for simulating assemblies of slender, one-dimensional structures using Cosserat Rod theory.
-[![gallery](https://github.com/skim0119/elastica-python/blob/assets_logo/assets/alpha_gallery.gif)][link-project-website]
+[![gallery][link-readme-gallary]][link-project-website]
Visit [cosseratrods.org][link-project-website] for more information and learn about Elastica and Cosserat rod theory.
@@ -108,6 +108,8 @@ _Names arranged alphabetically_
[//]: # (Collection of URLs.)
+[link-readme-gallary]: https://github.com/skim0119/PyElastica/blob/assets_logo/assets/alpha_gallery.gif
+
[link-project-website]: https://cosseratrods.org
[link-lab-website]: http://mattia-lab.com/
[link-docs-website]: https://docs.cosseratrods.org/
