README.md in svgen-0.0.1 vs README.md in svgen-0.0.2

@@ -8,21 +8,48 @@
 $ gem install svgen
 ```
 
 ## Usage
 
+### rect, circle, text
+
 ```rb
 require "svgen"
 
 svg = SVGen::SVG.new(width: 600, height: 400) do |svg|
   svg.rect(width: 300, height: 200, fill: "blue")
   svg.circle(cx: 100, cy: 100, r: 50, fill: "red")
+  svg.text("Sample Text", x: 20, y: 20)
 end
 svg.generate
 #=>
 # <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 # <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
 # <svg width="600" height="300" xmlns="http://www.w3.org/2000/svg">
 #   <rect width="300" height="200" fill="blue"/>
 #   <circle cx="100" cy="100" r="50" fill="red"/>
+#   <text x="20" cy="20">Sample Text</text>
+# </svg>
+```
+
+### group
+
+```rb
+require "svgen"
+
+svg = SVGen::SVG.new(width: 600, height: 400) do |svg|
+  svg.g(stroke: "red", "stroke-width" => 5) do |g|
+    g.rect(x: 50, y: 50, width: 100, height: 100)
+    g.circle(cx: 200, cy: 200, r: 50)
+  end
+end
+svg.generate
+#=>
+# <?xml version="1.0" encoding="UTF-8" standalone="no"?>
+# <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+# <svg width="600" height="300" xmlns="http://www.w3.org/2000/svg">
+#   <g stroke="red" stroke-width="5">
+#     <rect x="50" y="50" width="100" height="100"/>
+#     <circle cx="200" cy="200" r="50"/>
+#   </g>
 # </svg>
 ```