clunk.scene — com.kimbsy/clunk 2.0.1

fade-to-black clj

(fade-to-black {:keys [window current-scene scenes] :as state}
               target
               i
               transition-length)

transition clj

(transition
  {:keys [transitioning?] :as state}
  target
  &
  {:keys [transition-fn transition-length init-fn]
   :or {transition-fn fade-to-black transition-length 20 init-fn identity}})