apartment architecture balcony berlin building color colored colorful colors colour coloured colourful colours flat flats high-rise high-riser home large lichtenberg living place modern multi-storey multi-story multicolored multicoloured Plattenbau residence residential skyscraper tall tenement tower tower block tower building window windows accommodation angles box-like boxed concrete distinctive elements exterior external gray grey height high house light linear lines modernistic perspectives plain second-storey second-story squared straight structure structured style suburban two-storey two-story units urban views wall walls appearances architectural architectural elements arrows brickwork city Colonial contrast contrasting doors fire station historic historical history old patterns red reflections reflective shade shadows Singapore stone stonework sunlight textures appearance Australia barriers dark design escape exit fire-escape heritage masonry multi-level platforms railing rails rural safe safety solid stairs steps surfaces wood wooden abstract angled artistic Australian background geometric geometric shapes glass mottled orange panels patterned pointed points raised rectangles shapes shiny textured triangles turquoise uneven unusual varied wallpaper