I Want To Make A Robot That Ha

I want to make a robot that has 4 sensors and is a cube. My robot will have 4 circles on each side of the cub. Those circles will have little but strong propellers in them. Those propellers would make the cube over and fly. I also want the capability to make it were you don't have to control it. And it will follow you and listen to your commands. The cube's inside would be where the brain or computer chip would be. I think the cube should be about 4-6 inches tall. And it could have 1 camera.