As in, the process in the brain? Because if I could turn on 'sleep mode' while maintaining enough consciousness to perform basic tasks/hobbies then several hour

As in, the process in the brain? Because if I could turn on 'sleep mode' while maintaining enough consciousness to perform basic tasks/hobbies then several hours later turn off 'sleep mode' to regain full consciousness and feel fully rested then _YES_ sign me up for automated sleep.