Update README.md

GUI/README.md

@@ -1,4 +1,7 @@
 # **ASALI: Modeling and beyond**
+
+![start-up](https://i.imgur.com/Wz9OkVj.gifv)
+
 The Asali version with **Graphical User Interface** is an open-source code developed for engineers, chemists and students working on the modeling of gas phase mixture. From one side, thanks to its user-friendly interface, Asali is very helpful for those approaching the modeling of gas phase mixture for the first time. On the other side, the deep interaction with [Cantera](https://cantera.org/)  allows more expert users in performing detailed simulations without losing time in coding their own models.
 ## **1. Introduction**
 Let's go straight to the point! Asali main features are: