We would like to use lights to show family members' status. If they are free to answer a phone call, the light will turn green; if they are busy, the light will show red. Also, we would like to use smells to represent the feeling of missing. As well as you smell the scent, you know it's time to make a phone call and have a long chat with your beloved ones.
We would like to use the most simple and direct operation: pressing buttons as our input methods. We set three buttons, two for lights and one for smell.
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