I choose to start using the differents things learnt on this class without having an end product in mind, more of a "let's see what happens".
So I started using the Elipse tool and ended up with this series of rings:
And I kept trying to apply what was used on the pokeball (which I also draw btw ;) ) so I changed the tones to give it more of a 3D look:
Tried to add some glow (I guess I have to work on that):
It felt like some tubes could go down the middle so I draw one which then I duplicated to have four:
The tricky part was putting them inside but I'm pretty happy with the outcome:
And finally I added a yellow background: