alternating lines ?

how to get sort of alternating lines ?
not sure how to explain it, but if i want to have one line that is of background of colorscheme, and line after that, to have like some sort of deviation in terms of highlight. and line after this, to be again, background of colorscheme.
something like i have for current line on cursor with

    :set cursorline
    :set cursorcolumn

but i want whole file what is displayed to have that. not too much (not too strong like cursorline, but still, sligthly noticeable, enought, so it can help me see in distance on what line some text resides. because, often I need to look up closer and see if the motion i'm gonna apply is really going to the line i want it to go (as often i miss it) and that slows me

using colorscheme atom-dark

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