Press ctrl+j to duplicate this layer. Reduce its size. Select Rounded rectangle tool. Before drawing the shape, click on the paths. Draw a rounded rectangle, right click on the rectangle we just created, select Make selection. Set feather radius to 0 and click ok. Now press delete.

Keep the selection active. Press shift+ctrl+N to create a new layer. Set foreground to white and background to light blue color. Fill it with gradient.

Draw half rounded shape with the help of brush tool.

Your image should look like this.

Now we will create buttons for the image. For that draw an ellipse.

Apply these settings to the  ellipse.