Using dance as an anti-bullying statement, Cirque du Soleil & The Nevada Ballet adapts “The Green Flamingo,” a children’s book by 29-year-old autistic author David Pedemonte-Forte, who also composed the music. Both heartbreaking and uplifting, it follows one dancer garbed in green as the Flamingo, fending off prancing bullies who mob her until she collapses in misery. Yet there is respite in sunny choreography that apparently reflects the life she lives in her mind, a shelter of solace.