use_grass.rb

# Grass.new takes two arguments: 1. a dataset consisting of an array of arrays:
#
#   [["Label", 10], ["Second label", 78]]
#
# the second argument is optional, and should be a hash of desired options:
#
#   :width      - specify a CSS width, e.g. '100px' or '70%'
#   :height     - specify a CSS height, e.g. '200px' or '60%'
#   :color      - color of the bars, e.g. '#224488'
#   :text_color - color of label when placed inside a bar, e.g. '#DDDDDD'
#   :switch     - when a bar is less than this, the label will be printed above the bar
#   :class      - class name of containing <div>

Grass.new([["Apples", 10],["Oranges", 40],["Bananas", 32],["Pears", 88],["Other", 67]])