Make video (#5)

* generate accident scene

* construction PG

* no object

* accident prob

* capture script

* update nuscenes toolds

* make video

* format

* fix test

* update readme

* update readme

* format

* format

README.md

@@ -1,6 +1,23 @@
 # ScenarioNet
 
-ScenarioNet: Scalable Traffic Scenario Management System for Autonomous Driving
+**Open-Source Platform for Large-Scale Traffic Scenario Simulation and Modeling**
+
+[**Webpage**](https://github.com/metadriverse/scenarionet) |
+[**Code**](https://github.com/metadriverse/scenarionet) |
+[**Video**](https://github.com/metadriverse/scenarionet) |
+[**Paper**](https://github.com/metadriverse/scenarionet) |
+
+ScenarioNet allows users to load scenarios from real-world dataset like Waymo, nuPlan, nuScenes, l5 and synthetic 
+dataset such as procedural generated ones and safety-critical ones generated by adversarial attack.
+The built database provides tools for building training and test sets for ML applications.  
+
+![scenarios](docs/asset/scenarios.png)
+
+Powered by [MetaDrive Simulator](https://github.com/metadriverse/metadrive), the scenarios can be reconstructed for
+various applications like AD stack test, reinforcement learning, imitation learning, scenario generation and so on.
+
+![sensors](docs/asset/sensor.png)
+
 
 ## Installation