Your reference barcode, with the strip under the number left transparent. PNG out.
The whole image, number included. The PNG carries its dpi, so it prints at this size.
White behind the bars, exactly as in the reference; the number strip is transparent.
#000000
#ffffff
Transparent PNG, 32-bit RGBA — clear under the number.
Count up from the number above, or fill the list with fresh random ones. Edit it freely — one code per line.
Named 1.png, 2.png, 3.png … in list order.