code: def slice_twenty():
      return [
          slice(0, 4),
          slice(4, 8),
          slice(8, 12),
          slice(12, 16),
          slice(16, 20),
      ]
  
imports: import geopandas
  import numpy
  import pandas
  import pytest
  from shapely.affinity import rotate
  from shapely.geometry import LineString, MultiLineString, MultiPoint, MultiPolygon, Point, Polygon
label_desc: Use image node_id 12 for calling a global function with example usage: slice_twenty() and returns: list