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diff --git a/ruby_1_8_6/ext/tk/sample/tkextlib/blt/pareto.rb b/ruby_1_8_6/ext/tk/sample/tkextlib/blt/pareto.rb
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+#!/usr/bin/env ruby
+
+require 'tk'
+require 'tkextlib/blt'
+
+# Example of a pareto chart.
+#
+# The pareto chart mixes line and bar elements in the same graph.
+# Each processing operating is represented by a bar element.  The
+# total accumulated defects is displayed with a single line element.
+b = Tk::BLT::Barchart.new(:title=>'Defects Found During Inspection', 
+                          :font=>'Helvetica 12', :plotpady=>[12, 4], 
+                          :width=>'6i', :height=>'5i')
+Tk::BLT::Table.add(Tk.root, b, :fill=>:both)
+
+data = [
+  ["Spot Weld",  82,   'yellow'], 
+  ["Lathe",      49,   'orange'], 
+  ["Gear Cut",   38,   'green'], 
+  ["Drill",      24,   'blue'], 
+  ["Grind",      17,   'red'], 
+  ["Lapping",    12,   'brown'], 
+  ["Press",       8,   'purple'], 
+  ["De-burr",     4,   'pink'], 
+  ["Packaging",   3,   'cyan'], 
+  ["Other",      12,   'magenta']
+]
+
+# Create an X-Y graph line element to trace the accumulated defects.
+b.line_create('accum', :label=>'', :symbol=>:none, :color=>'red')
+
+# Define a bitmap to be used to stipple the background of each bar.
+pattern1 = Tk::BLT::Bitmap.define([ [4, 4], [1, 2, 4, 8] ])
+
+# For each process, create a bar element to display the magnitude.
+count = 0
+sum   = 0
+ydata = [0]
+xdata = [0]
+labels = []
+
+data.each{|label, value, color|
+  count += 1
+  b.element_create(label, :xdata=>count, :ydata=>value, :foreground=>color, 
+                   :relief=>:solid, :borderwidth=>1, :stipple=>pattern1, 
+                   :background=>'lightblue')
+  labels[count] = label
+  # Get the total number of defects.
+  sum += value
+  ydata << sum
+  xdata << count
+}
+
+# Configure the coordinates of the accumulated defects, 
+# now that we know what they are.
+b.element_configure('accum', :xdata=>xdata, :ydata=>ydata)
+
+# Add text markers to label the percentage of total at each point.
+xdata.zip(ydata){|x, y|
+  percent = (y * 100.0) / sum
+  if x == 0
+    text = ' 0%'
+  else
+    text = '%.1f' % percent
+  end
+  b.marker_create(:text, :coords=>[x, y], :text=>text, :font=>'Helvetica 10', 
+                  :foreground=>'red4', :anchor=>:center, :yoffset=>-5)
+}
+
+# Display an auxillary y-axis for percentages.
+b.axis_configure('y2', :hide=>false, :min=>0.0, :max=>100.0, 
+                 :title=>'Percentage')
+
+# Title the y-axis
+b.axis_configure('y', :title=>'Defects')
+
+# Configure the x-axis to display the process names, instead of numbers.
+b.axis_configure('x', :title=>'Process', :rotate=>90, :subdivisions=>0, 
+                 :command=>proc{|w, val|
+                   val = val.round
+                   labels[val]? labels[val]: val
+                  })
+
+# No legend needed.
+b.legend_configure(:hide=>true)
+
+# Configure the grid lines.
+b.gridline_configure(:mapx=>:x, :color=>'lightblue')
+
+Tk.mainloop