Update README.md

Author: shaojieb

README.md

@@ -31,7 +31,7 @@ The structure of a multiscale deep equilibrium model (MDEQ) is shown below. All
 Some examples of MDEQ segmentation results on the [Cityscapes](https://www.cityscapes-dataset.com/) dataset.
 
 <p align="center"/>
-<img src='images/demo.gif' width="300px"/>
+<img src='images/demo_overlay.gif' width="500px"/>
 <img src='images/segmentation_example.png' width="800px"/>