Blending Options-Stroke

Copy the recently created layer and turn it around on 180 degrees using Free Transform option.

Use the old instrument to represent one more figure with the parameters from below.

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

Gradient’s parameters.

Blending Options-Stroke

Continue with the same instrument and picture a figure of black color.

And one more of the same color.

Use the old instrument to draw one more figure of black color, like it is shown below.

And one more like in the picture.