Non existent object
Since the text "Non existent object" implies something that doesn't exist, it's impossible to provide a specific description for an AI image generator to create a lifelike picture. However, using a bit of imagination, we could reinterpret this instruction to mean an object that currently doesn't exist, but could potentially exist in a fictional or futuristic context.
For example, consider a hover skateboard from a science fiction story. Imagine a skateboard-like device, blue and silver, floating a foot above the ground