The maximum dive depth for recreational diving has always been 30 metres, beyond which the illusory boundary of life and safety is in danger. At the same time, all colours except blue fade away after 23 metres due to the absorption of the light spectrum by the sea.
I throw an apple into the sea and let it sink 30 metres, the colour of the apple itself will be swallowed by the sea and turn completely blue as it sinks 30 metres, thus symbolising the fall of a life.
The work will follow a forbidden fruit as it falls to the bottom of the sea by diving, pushing closer and closer to cross the extreme boundary, but eventually losing its original colour of life in the process of falling.