Julia plots: How to fill graph background with different colors

General Usage
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2

Do you mean something like this?

using Plots
gr()
data = Plots.fakedata(50,2)
p = plot(data, w=3);
hspan!(p,[0,maximum(data)], color = :green, alpha = 0.2, labels = "good");
hspan!(p,[minimum(data),0], color = :red, alpha = 0.2, labels = "bad");
display(p) # or savefig(p, "filename.png")

display

I’ve also tried combining the two calls to hspan!, but the backend didn’t like that on my pc - might work on yours.