This could be done with white fabric painted with black, then lit with green, orange, and finally, blue (as the day progresses) for the forest scene. A Midsummer Nights Dream opera. Jayme Mellema scenic design for The Princeton Festival.
Keyboard storage / stand from a modified recycled upright piano that used to be covered in two layers of white paint. My Nord Stage 2 with 88 keys cm) fitted almost perfectly in this less than 88 keys upright piano cm). Airstrip guiding light on stand.