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

@@ -1,19 +1,56 @@
-# Ruby X
+# Rubyx [![Gem Version](https://badge.fury.io/rb/rubyx.svg)](http://badge.fury.io/rb/rubyx)
 
-A tool to run a Ruby script while showing the executed command, just like
-`bash -x`.
+A tool to run a Ruby script while showing the executed lines of code.
 
 ## Installation
 
 ```bash
 $ gem install rubyx
 ```
 
 ## Usage
 
-```bash
-$ rubyx file.rb
+```
+$ rubyx -h
+Usage: rubyx [options] <file> -- [arguments]
+
+Options:
+    -i PREFIX            Set prefix for source code (default: "")
+    -o PREFIX            Set prefix for standard output (default: "# => ")
+    -h                   Show this message
+```
+
+## Example
+
+```
+$ rubyx input.rb > output.rb
+```
+
+In `input.rb`:
+
+```ruby
+def say
+  puts 'Hello!'
+end
+
+say
+
+puts 'Bye!'
+```
+
+In `output.rb`:
+
+```ruby
+def say
+  puts 'Hello!'
+end
+
+say
+# => Hello!
+
+puts 'Bye!'
+# => Bye!
 ```
 
 ## Contributing
 
 1. [Fork](https://help.github.com/articles/fork-a-repo) the project.