Draw an interface image on the landing page

You need to draw an image of the interface on the landing page. You need 5 images of the web service interface to insert on the landing page. An example of an image can be taken from here: Text verborgen. I will provide the interface sketches a little later.
Style: realistic images of the interface.
A wish from the background:
Colors:
Size: for the web site.
Format: File format to provide in PNG or similar.
Requirements for the contractor: Provide examples of work.