Purogo MakingNamedBlocks

Let's make our last asterisk example more funky and make the lines dashed like we made a dashed line earlier. Name this drawing 'dashed_asterisk':

turtle("dashed asterisk") do |*args|
  length = (args[0] or 10).to_i

  dashed_line do
    (length / 2).times do
      block :sandstone
      forward 1
      block :none
      forward 1
    end
  end

  mark "center"  
  8.times do |i|
    turnright i*45
    dashed_line
    goto "center"
  end
end

At any point you can make a named block by giving a name ('dashed_line') followed by a do...end block. This ends up reserving the name in your drawing for later recall. The contents between the do and end will be executed whenever your drawing later encounters the name of the named block. In the example above, we now have a named block for drawing a dashed line. The only change from the previous version of asterisk is that instead of calling 'forward length' we are now calling 'dashed_line'. If you run this you will see we now have a funky asterisk. We may have enough tools now to start our first Purogo-MyFirst3DDrawing.