Img blur 1

class Image
    def initialize(darray)
        @arr = darray
    end
    
    def output_image
        str = []
        length = @arr.length
        @arr.each_index do |i|
            str[i] = @arr[i].join('').to_s
            puts str[i]
        end
        return
    end
end

image = Image.new([
  [0, 0, 0, 0],
  [0, 1, 0, 0],
  [0, 0, 0, 1],
  [0, 0, 0, 0]
])

image.output_image

Input:
[0, 0, 0, 0],
[0, 1, 0, 0],
[0, 0, 0, 1],
[0, 0, 0, 0]

Output:
0000
0100
0001
0000