A unique id. Transitions and initialState refer to the state by it.
The name shown in the editor.
Playback speed. At 1, each frame lasts 0.1 seconds. At 2, it lasts
0.05 seconds. It must be above 0.
The frames of the state.
The transitions to other states.
individual has one timeline. group picks one of several timelines.
A state with one timeline.