adding my demo

Author: Aadarsh

scenes/parking/demo_4.yaml

@@ -1,19 +1,30 @@
-vehicle_state: [0.0, 0.0, 0.0, 0.0, 0.0]
+vehicle_state: [-20, -15, 1, 0.0]
 agents:
-  ped1:
-    type: medium_truck
-    position: [2.5, 8.0]
+  cone1:
+    type: cone
+    position: [-3.0, -2.0]
     nominal_velocity: 0.0
-    target: [20.0, 8.0]
+    target: [-10.0, -8.0]
     behavior: loop
-    yaw: 1.5708
-
-  ped2:
-    type: medium_truck
-    position: [7.5, 8.0]
+    yaw: 0
+  cone2:
+    type: cone
+    position: [3.0, -2.0]
     nominal_velocity: 0.0
-    target: [15.0, 4.0]
+    target: [-10.0, -8.0]
     behavior: loop
-    yaw: 1.5708
-
-    
+    yaw: 0
+  cone3:
+    type: cone
+    position: [-3.0, 2.0]
+    nominal_velocity: 0.0
+    target: [-10.0, -8.0]
+    behavior: loop
+    yaw: 0
+  cone4:
+    type: cone
+    position: [3.0, 2.0]
+    nominal_velocity: 0.0
+    target: [-10.0, -8.0]
+    behavior: loop
+    yaw: 0