Yeah it's all in the wallpaper, I'll upload the Homescreen one so you can see what I mean. All in the wallpaper, after that, you use theme customizer to set the taskbar opacity to 0, aka, completely invisible. This gives the homescreen the appearance that it's a long taskbar, if you add it to the top 56 pixels of all of your views, inside the wallpaper, it gives it the appearance that the bar itself never moves.