For this tutorial, you will need a tube to download here, and the Factory G filter that you can import in your Unlimited 2 filter.
1 – Open a new image, 550 x 550, white background.
2 – Effects – Filter Factory G – Fractal Magic 2 with the following settings:
90/233/121/254/5/162/100/64.
3 – Effects – Illumination Effects – Sunburst :

Color : #819ba9
Repeat a second time.
4 – Copy and paste the tube as a new layer and move it to the side.
5 – Layers – Merge all.
6 – Image – Add borders : 25 pixels, contrasting color.
Select that border with the magic wand.
Flood fill with a linear gradient, 45°, 5 repeats, made up of these two colors:
#819ba9 and #d4dde1.
7 – Selection – Invert.
Effects – 3D – Cutout:

Deselect.
8 – Image – Add borders : 2 pixels of a dark color.
9 – Sign and Merge all.
File – Export – JPEG Optimizer.