Create an abstract street art mural that depicts a vibrant, swirling sky filled with whimsical creatures and dreamlike landscapes.

Generate an abstract street art mural. The mural includes a swirling, vibrant sky that takes up the bulk of the canvas. Populating this sky are numerous whimsical creatures of various kinds – perhaps some with wings, some with horns, and some with more unusual features still. Interwoven with these creatures are elements of a dreamlike landscape. Maybe, this includes floating islands, towering waterfalls that defy gravity, or trees with leaves of rainbow hues.