NOVELTY - The apparatus has a sprocket gear shaft arranged at a top section of a motor and connected to a hand crank gearbox. Rail guides expend and collapse collapsible and expandable bellow cambers on the motor. A set of changeable rail guides (10) is arranged on a first side of the motor to shut down the motor. Sprocket chain rail guides are provided with Teflon (RTM: PTFE) to guide the sprocket chain carrier (7) with bearings inserts. Sprocket gears (9) are arranged on a shaft (3) at a bottom section of the motor and connected to a gearbox or water pump.    USE - Gravity and buoyancy actuated apparatus i.e. gravity and buoyancy motor, for generating electrical power from combination of gravity forces and inherent buoyancy of expanded bellow chambers immersed in fluid to supply electrical power to a high rise building and large commercial establishment, suburban subdivisions or village, and a residential home.    ADVANTAGE - The apparatus is devised using principles of gravity and buoyancy to achieve power output without fossil fuel or other combustion, and wind energy or solar energy, and designed to be clean, efficient and highly effective in providing significant power output to power input, and ensures reduced maintenance with ease. The apparatus provides gravity to generate considerable electricity continuously power from a combination of gravity forces and inherent buoyancy of the expanded bellow chambers immersed in fluid through a conveyer type of provision on a long continuous sprocket chain/carrier to which the bellow chamber elements are attached along entire length of the carrier and without polluting an environment. The motor avoids need for external assistance to expand and collapse the chamber modules or to maintain consistency of force to turn the output shaft since the chamber modules operate in a synchronized mariner.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of a gravity and buoyancy motor in an assembled state.    Generator (1)    Shaft (3)    Sprocket chain carrier (7)    Sprocket gears (9)    Changeable rail guides (10)