now --- now
now --- now {coord. adv.}
Sometimes... sometimes; by turns; at one time... then at another. — Often used with adjectives that are very different or opposite, especially to show change.
The weather changed every day; it was now hot, now cool.
The band played different songs, now fast, now slow; now soft, now loud.
Billy ran so quickly he seemed to be all over the field; he was now here and now there.
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Source: A Dictionary of American Idioms