code: def parse_gradient(line, world_size):
      
      # remove "GRADIENT_RESOURCE"
      line = line[18:]
  
      sline = [el.strip() for el in line.split(":")]
      name = sline[0]
      name = reduce_resource_name_to_task(name)
      radius = None
      x = None
      y = None
  
      # Extract data
      for item in sline:
          if item.startswith("height"):
              radius = int(item.split("=")[1])
          elif item.startswith("peakx"):
              x = int(item.split("=")[1])
          elif item.startswith("peaky"):
              y = int(item.split("=")[1])
  
      # Translate circle to cells)
      cells = []
      for i in range(world_size[0]):
          for j in range(world_size[1]):
              if (dist((i, j), (x, y))) <= radius-1:
                  cells.append((i, j))
  
      return (name, cells)
docs: Takes a string representing a GRADIENT_RESOURCE (as specified in Avida
      environment files) and a tuple representing the x and y dimensions of the
      world, and returns the name of the gradient resource and a list of
      tuples representing the cells it's in.