# How to Get Rid of Blue Line in This Plot of Reflection?

Hi all,

I am filling a region between two curves from reflection.

``````using Plots, LaTeXStrings, Plots.PlotMeasures
gr()

function make_fg_plot()
g(x) = sin(x^2) + cos(2x) -1

yshift = y -> y + 5
yreflection = y -> -y
ytransform = yshift ∘ yreflection

plt = plot(; xtick=:false, ylims = (-8, 15),
legend = :topleft, bottom_margin=5mm)
for (T, attrs) in [(identity, (;label = "", linecolor = :green)),
(ytransform, (;label = "", linecolor = :red))]

plot!(plt, T ∘ g, 2, 4; label="")

plot!(f, fillrange = T ∘ g, fillalpha = 0.35, c = 1,
label = "", legend=:topright)

annotate!([(2.03,9, (L"f(x)", 10, :black))])
annotate!([(2.03,-3, (L"g(x)", 10, :black))])
annotate!([(2,-9, (L"a", 10, :black))])
annotate!([(2,-8.1, (L"|", 10, :black))])
annotate!([(3,-9, (L"x", 10, :black))])
annotate!([(3,-8.1, (L"|", 10, :black))])
annotate!([(4,-9, (L"b", 10, :black))])
annotate!([(4,-8.1, (L"|", 10, :black))])
end
return plt
end

make_fg_plot()
``````

But, there is an annoying blue line in the middle, how to get rid of this?

Done by kill the terminal and replace f with g