diff --git a/README.md b/README.md
index 1da9081..fb4ebde 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,8 @@ You can customize the colorize rule by regular expression.
 
 ![demo](https://github.com/dalance/pipecolor/blob/master/sample/pipecolor.gif)
 
+This demonstration uses `./sample/demo.toml` configuration.
+
 ## Install
 Download from [release page](https://github.com/dalance/pipecolor/releases/latest), and extract to the directory in PATH.
 
diff --git a/sample/demo.toml b/sample/demo.toml
new file mode 100644
index 0000000..84c38d1
--- /dev/null
+++ b/sample/demo.toml
@@ -0,0 +1,72 @@
+[[lines]]
+    pat    = "(^Error:).*"
+    colors = ["Red", "LightRed"]
+    tokens = []
+[[lines]]
+    pat    = "(^Warning:).*"
+    colors = ["Yellow", "LightYellow"]
+    tokens = []
+[[lines]]
+    pat    = "(^Information:).*"
+    colors = ["Green", "LightGreen"]
+    tokens = []
+[[lines]]
+    pat    = "(^Info:).*"
+    colors = ["Green", "LightGreen"]
+    tokens = []
+[[lines]]
+    pat    = "^Verification (SUCCEEDED)"
+    colors = ["Green", "LightGreen"]
+    tokens = []
+[[lines]]
+    pat    = "^Verification (FAILED)"
+    colors = ["Red", "LightRed"]
+    tokens = []
+[[lines]]
+    pat    = "^(Error-\\[[^]]*\\]).*"
+    colors = ["Red", "LightRed"]
+    tokens = []
+[[lines]]
+    pat    = "^(Warning-\\[[^]]*\\]).*"
+    colors = ["Yellow", "LightYellow"]
+    tokens = []
+[[lines]]
+    pat    = "^(Lint-\\[[^]]*\\]).*"
+    colors = ["Green", "LightGreen"]
+    tokens = []
+[[lines]]
+    pat    = "^(ERROR: \\[[^]]*\\]).*"
+    colors = ["Red", "LightRed"]
+    tokens = []
+[[lines]]
+    pat    = "^(CRITICAL WARNING: \\[[^]]*\\]).*"
+    colors = ["Magenta", "LightMagenta"]
+    tokens = []
+[[lines]]
+    pat    = "^(WARNING: \\[[^]]*\\]).*"
+    colors = ["Yellow", "LightYellow"]
+    tokens = []
+[[lines]]
+    pat    = "^(INFO: \\[[^]]*\\]).*"
+    colors = ["Green", "LightGreen"]
+    tokens = []
+[[lines]]
+    pat    = "(^Error   :).*"
+    colors = ["Red", "LightRed"]
+    tokens = []
+[[lines]]
+    pat    = "(^Warning :).*"
+    colors = ["Yellow", "LightYellow"]
+    tokens = []
+[[lines]]
+    pat    = "(^Info    :).*"
+    colors = ["Green", "LightGreen"]
+    tokens = []
+[[lines]]
+    pat    = "(^\\*\\*ERROR: \\([^)]*\\):).*"
+    colors = ["Red", "LightRed"]
+    tokens = []
+[[lines]]
+    pat    = "(^\\*\\*WARN: \\([^)]*\\):).*"
+    colors = ["Yellow", "LightYellow"]
+    tokens = []