Select next shown parameters for the last made layer: Blending mode-Color Burn
On the last stage we’ll try drawing the reactive movers of the beetle, selecting the Ellipse Tool (U).
The layer’s parameters: Blending Options>Bevel and Emboss
Blending Options>Gradient Overlay
Using the last applied tool, try to make now the exit opening of the reactive engine. The layer’s color in this case should be white.
The layer’s parameters: Blending Options>Outer Glow
Merge down the layers composing the reactive engines (CTRL+E). Make a copy of the new layer and select Free Transform option to turn over the copy, placing it the way demonstrated next image.
The picture is finished!
View full size here.