Show more information in terminator examples

[HideakiImamura]

Motivation

This is a follow-up of #190. Showing more information in terminator examples and use if __name__ == "__main__".

Description of the changes

• Show more information.
• Use if __name__ == "__main__".
• Fix CI conditions.

[HideakiImamura]

@gen740 Could you review this PR?

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