autumn background backgrounds beautiful blue bright color fall flora foliage forest gold golden leaf leaves light maple nature outdoor pattern scenic season seasonal seasons sky sun sunlight sunny sunshine texture tree vibrant vivid yellow abstract cloud colorful dusk evening fantasy horizon landscape Morning orange panorama pink red scenery silhouette skyline summer sunrise sunset travel twilight vacation angry apocalyptic approaching storm black brilliant clouds colourful contrast contrasting dark darkening disturbing dramatic fiery flaming gold foreboding frightening glory lighting molten skies moody setting sun shadows shining silhouettes skies southern spreading storm storm clouds stormy weather appearance beams breaking through colour dark clouds darkness radiant radiating rays shining through threatening wild