This was my first attempt, a few days before. Its a very simple idea yet again, the fidget spinner is glued to the front of the metal panel. then underneath the legs is a LIGHT DEPENDENT RESISTOR (LDR). this then gets obscured by the fidget spinner, blocking light to the LDR, the LDR is wired between two jacks. super simple, one jack socket, wired to one leg of the LDR, and the other leg of the LDR to the other jack socket, it doesn't matter which way around. then simply connect both grounds of the jack sockets together and its done!!! its kinda cool. but its a bit naff.