text: import scadnano as sc
  
  
  def create_design() -> sc.Design:
      length = 9
      helices = [
          sc.Helix(max_offset=length, major_ticks=[2, 5], position=sc.Position3D(x=1, y=2, z=3), pitch=90)]
      stap_ss = sc.Domain(0, True, 0, length)
      scaf_ss = sc.Domain(0, False, 0, length)
      stap = sc.Strand([stap_ss])
      scaf = sc.Strand([scaf_ss], color=sc.default_scaffold_color)
      strands = [stap, scaf]
      design = sc.Design(helices=helices, strands=strands, grid=sc.Grid.none)
      design.assign_dna(scaf, 'AACT' * (length // 4))
  
      return design
  
  
  if __name__ == '__main__':
      d = create_design()
      d.write_scadnano_file(directory='output_designs')
  