new_contents: TERATIONS = 300
  
  
  class Julia(object):
      def __init__(self, width, height, k_r, k_i,
                   min_r=-2.0, max_r=1.0, min_i=-1.5, iterations=ITERATIONS):
          self.k_r = k_r
          self.k_i = k_i
          self.min_r = min_r
          self.max_r = max_r
          self.min_i = min_i
          self.max_i = min_i + (max_r - min_r) * height / width
          self.width = width
          self.height = height
          self.iterations=iterations
          self.pre_height = (self.max_r - self.min_r) / (self.width - 1)
          self.pre_width = (self.max_i - self.min_i) / (self.height - 1)
  
      def get_c(self, x, y):
          real = self.min_r + x * self.pre_height
          imaginary = self.min_i + y * self.pre_width
          return (real, imaginary)
  
      def get(self, x, y):
          return self.julia(*(self.get_c(x, y)))
  
      def julia(self, real, imaginary):
          for i in range(self.iterations):
              if pow(real, 2) + pow(imaginary, 2) > 4:
                  return i
              tmp_imaginary = imaginary
              imaginary = 2 * real * imaginary + self.k_i
              real = real * real - tmp_imaginary * tmp_imaginary + self.k_r
          return self.iterations
  
subject: add julia