draw me a realistic and futuristic city with advanced buildings and flying cars(not all fly though) and supersonic trains and planes(not all supersonic) there are many trees and people and please draw it with color. there are also saucer-like drones in the sky. people are happy and they are all healthy.and please draw it realistic and not like an animation and the sky is clear with drones and planes and flying cars.(not too much and the cars fly in low altitude just over the road)and PLEASE DRAW IT REALISTIC