A little practice homework...
In order not to hand in hand-drawn jobs, direct modeling is selected.
I suddenly thought about how to open the camera lens of polaroid
It is also associated with the way the camera aperture is adjusted.
Strange ideas have increased again.
Visualize the turn-on and volume adjustment of the speaker
"Turn the lens to adjust the aperture"
"Turn the lens to adjust the volume"
I don't know if it can be realized
But a dream is still wide...
Hope master's advice

(Color and typesetting imitate the design of an aromatherapy machine I have seen before... In the study of the student party, I beg the great god to understand)