How to Convert this Code to For loop / Function?

General Usage
9

There is little reason to make that many plots. Just make one plot for odd and one for even.

scatter!(p, 1:2:33, n->(-1)^isodd(n)/n; color=:red, label=L"a_n=1/n", markesize=4) 
scatter!(p, 2:2:33, n->(-1)^isodd(n)/n; color=:green, label=L"a_n=-1/n", markesize=4)
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