Modified grey circles to run without install

grey_circles.rb

# grey circles : borrowed from https://github.com/quil/quil

require_relative "../lib/ribiprocessing"

class GreyCircles < Ribiprocessing::SimpleApp

  def setup
    size(600, 800)
    frame_rate(2)
    background(200)
  end

  def draw
    stroke_setup
    diameter = rand(100)
    ellipse(rand(width), rand(height), diameter, diameter)
  end

  def stroke_setup
    [:stroke, :stroke_weight, :fill].each do |method|
      send(method, rand(255))
    end
  end
end

GreyCircles.new title: "Oh so many circles"