text: import ncadquery as cq
  
  # These can be modified rather than hardcoding values for each dimension.
  length = 80.0  # Length of the block
  height = 60.0  # Height of the block
  thickness = 10.0  # Thickness of the block
  center_hole_dia = 22.0  # Diameter of center hole in block
  
  # Create a block based on the dimensions above and add a 22mm center hole.
  # 1.  Establishes a workplane that an object can be built on.
  # 1a. Uses the X and Y origins to define the workplane, meaning that the
  # positive Z direction is "up", and the negative Z direction is "down".
  # 2.  The highest (max) Z face is selected and a new workplane is created on it.
  # 3.  The new workplane is used to drill a hole through the block.
  # 3a. The hole is automatically centered in the workplane.
  result = (
      cq.Workplane("XY")
      .box(length, height, thickness)
      .faces(">Z")
      .workplane()
      .hole(center_hole_dia)
  )
  
  # Displays the result of this script
  show_object(result)
  