Documentation:
Typewriter

Typewriters can trigger other typewriters to type when they finish.

In the typewriter that you wish to BE triggered:

1. Set the Trigger setting to Start typing when triggered.
2. Enter a unique identifier for the typewriter into the Trigger ID field. (eg. Typewriter-B)

In the typewriter that you wish to DO the triggering:

1. Set the Trigger setting to Start typing immediately or Start typing when visible.
2. Enter the Trigger ID for the typewriter you wish to trigger into the Trigger Others field. (eg. Typewriter-B)

In the example shown here, Typewriter-A will start typing when it becomes visible on the page. Typewriter-B will then start typing when Typewriter-A finishes.

See here for another example.