Million Man march in support of Donald Trump in Washington

The speaker shares their four years of experience, briefly mentions the skylight system, and concludes by stating their limitations.

What has the speaker been doing for four years?

How do the statements reflect the speaker's feelings or opinions?

What is the skylight system mentioned in the text?

What does the speaker mean by 'I can't do that'?

What significance does the word 'Period' hold in the context?