Make 3D model for casing of necklace that has electronics inside

Please read the project very carefully. I need this done in 12 hours from starting. I will add as many milestones as needed but starting is 50 dollars. It is a necklace with electronics on the inside, I need to get it 3D printed. My appointment is in 15 hours so please understand it must be finished now. I have attached pictures, we will get on a call and discuss more clearly. I will pay as much needed as we go but starting i will only pick lowest bid. You must be able to design and add as we go. I have many projects, and many more to give work. If you treat me well I will return it a thousand times. Thank you.