I want to blend two colors as a background.  I'm adding a layer using
CAGradient layer, starting on the left with blue alpha=1. and ending
on the right with blue alpha=0.

I then add another layer using red on the left with alpha=0. and
ending on the right with alpha=1.

I wonder if it is best to draw this background, or, create a .png and
just post it.

Suggestions?
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