# File karel/karel_window.rb, line 276 def make_streets_and_avenues @_streets.times do |i| x,y = scale_to_pixels(i + 1, 0.5) tx,ty = scale_to_pixels(i + 1, @_streets + 0.5) @_walls << TkcLine.new(@canvas,x,y,tx,ty, :fill => 'red') x, y = scale_to_pixels(0.5, i + 1) tx, ty = scale_to_pixels(@_streets + 0.5, i + 1) @_walls << TkcLine.new(@canvas,x,y,tx,ty, :fill => 'red') end end