action aerial aerofoils air blue cloud color colour diversity England english flock fly glide gliders Great Britain green group hang-gliders hangglider hill landscape on the move outdoor parachutes paragliders sky soar South Downs sport summer suspend Sussex autumn autumnal background branches brown colored colorful colors coloured colourful colours dark dead decay dry edge edges fall leaves maroon nature red reddish russet seasons shapes skies texture textures tree twigs variations variety angry apocalyptic bright brilliant clouds contrast darkening disturbing dramatic dusk evening fiery flaming gold foreboding frightening glory golden light lighting molten skies moody setting sun shadows shining silhouette silhouettes spreading sun sunset