I tried to several desktop environments. I tried Unity, Gnome, kDE (?) and now Cinnamon. I liked Cinnamon, I once saw screenshot of someone who has nicely modified it, to make it look very awesome. He had clock in top right corner which seemed on be on background level, he also had darkened menu background and the bottom bar to really dark, so I think it looked very awesome. I tried to Google "How to modify looks of desktop environment?", which provided me with list of most popular desktop environments. "How to modify appearance of desktop environment?", produced same result. How can I modify color and background of objects? I know you can change font colors, family type and sizes, but that's not background. Also, how do I download such cool widgets like clock?