====== Example: Use multiple overlay object resources ======
The example below demonstrates how overlay objects can be added to multiple resources.
* Resource 1 has red triangles
* Resource 2 has green triangles
Pressing "Add Object" will add an object on a random position.\\
Pressing clear will remove all objects for that resource.
Try pressing add multiple times on both resources and observe 2 resources are added to the viewer. Then press "Clear" on one of them, so observe all objects with one color (red or green) to disappear.