Make a copy of the new made layer and place it the way it is demonstrated next picture.



The next step includes selecting firstly the Pen Tool (P) and draw a triangle (the button’s symbol), having the black color.



Blending Mode-Overlay
Copy it on another button, turning it over with Free Transform selection.



Now we have to draw a flare on the button’s surface that would have the white color, using the Ellipse Tool (U), erasing the lowest top with Delete Anchor Point Tool



The layer’s parameters:
Fill 80% on the layers.
Blending Mode-Soft Light



Select now the Line Tool (U) to represent two vertical stripes of black and white color.



The layers’ parameters:
Blending Mode-Overlay