Take now the next instrument and outline the right arm of the penguin.

Create Linux Operating System desktop background in Photoshop CS

Create Linux Operating System desktop background in Photoshop CS

Fill 0% on the layers.
Blending Options-Gradient Overlay

Create Linux Operating System desktop background in Photoshop CS

Gradient?s
parameters:

Create Linux Operating System desktop background in Photoshop CS

Selecting the previous instrument, it?s possible to continue representing the penguin?s arm.

Create Linux Operating System desktop background in Photoshop CS