Update README

README.md

@@ -1,2 +1,23 @@
 # excitation
 The CLI tool to generate IP addresses for documentation as defined by RFC5737
+
+## Example
+
+```sh
+$ ./excitation --help
+The CLI tool to generate IP addresses for documentation as defined by RFC5737
+
+Usage: excitation [OPTIONS]
+
+Options:
+  -n, --number <NUMBER>  Number of generate addresses [default: 1]
+  -b, --block <BLOCK>    Network block [default: 1]
+  -h, --help             Print help
+  -V, --version          Print version
+
+$ ./excitation -b 3 -n 4
+203.0.113.60
+203.0.113.15
+203.0.113.187
+203.0.113.100
+```