We want a simple and minimalistic illustration.
If the user gets on the page the first time with no clue what we are doing, the illustration should tell him what he will find on our page.
The blue button on the page is the highlight of it, so don't build up an monumental illustration with to many details, it could distract the attention of the user to much! The Illustration should get a bit bigger than the example of implementation on our index page shows.
We have some colors used on the webpage you can use too for the illustration, but if you think different colors would fit here too, use them!
PS: We removed the description our own idea to get more different ideas from you.