blue clouds countryside Devil's Dyke down England english exercise flowers footpath forest Great Britain green hills landscape meadow natural nature rural sky South Downs steep summer Sussex track trail travel trees walk wild woodland yellow angry apocalypse apocalyptic beams beautiful black breaking through bright cloud color colour concepts contrast creation danger dark darkening disturbing dramatic foreboding frightening glory golden light lighting moody radiant radiating rays shining signs skies spreading storm storm front stormy sun sunlight threatening thunder thunderhead appearance brilliant colorful colourful contrasting dark clouds darkness dusk evening setting sun shining through sunset