update readme

Author: PeterDaveHello

README.md

@@ -7,11 +7,21 @@ Make echo colorful with easier method. In [bash](https://www.gnu.org/software/ba
 
 ## Usage
 
+* echo.`Style`.`Color`
+
+### Examples
+
 * echo.Cyan CyanExample
 * echo.ULCyan UnderLineCyanExample
 * echo.BoldCyan BoldCyanExample
 * echo.BoldULCyan BoldUnderLineCyanExample
 
+## Supported styles
+
+* Bold as `Bold`
+* Light as `Light`
+* Underline as `UL`
+
 ## Supported colors
 
 * See [color table](https://cdn.rawgit.com/PeterDaveHello/ColorEchoForShell/master/table.txt)