Interaction with other objects and Video
An object can interact with other objects. For example, a glow appears around
a text when the mouse moves it.
Click on an item to get more information:
Moving mouse.
Mouse click on object.
Clicking the mouse on an object can trigger another action after the first
one.
For example, the first action can hide a whole group and the second action can
show a single member of the group.
For two actions with a mouse click and nested grouping you can create almost
any effect.