Manages fast and slow walking times, and uses a metronome to announce specified times (in minutes).

A new feature has been added: you can define exercises such as stretching, and then combine defined exercises to create an exercise menu.
When defining an exercise, you can set the image or video to be displayed, the exercise name to be read aloud, background music, and display time.
For the menu, you can set the number of exercise sets and the number of repetitions of the menu itself.

----------------------------------------------------------------------------------------------
Display and Playback Timing

When the playback time is 0

1. The image display or video begins playback.
2. If there is a "reading" then the reading begins.
3. If the video has not finished when the reading ends, wait for the video to finish.
Even if reading is in progress, if the video finishes first, the reading will end.
4. End

When the playback time is positive

1. The image display or video begins playback.
2. If there is a "reading" then the reading begins.
3. The timer starts when the reading ends and ends when the timer ends.
The video will be interrupted even if it has not finished.

When the playback time is negative

1. The image display or video begins playback.
2. If there is a "reading" then the reading begins.
3. The timer starts at the same time and ends when the timer ends.
The video will be interrupted even if it has not finished.

If you want the audio/music to begin after the reading is complete, set the playback time to a positive value.
If the video is long, set the time to include the desired video playback duration.
---------------------------------------------------------------------------------------------------
You can use SSML for speech. You can also select the language to use for speech.