Passage:
> Arms bending and stretching!' she rapped out. '**Take your time by me**. One, two,
three, four! One, two, three, four! Come on, comrades, put a bit of life into it!

*(George Orwell 1984)*

Question:
> What does the phrase 'take your time by me' mean?

[Link to the book (page #22)][1]

[1]: http://www.planetebook.com/ebooks/1984.pdf