Readme change;

README.md

@@ -1,10 +1,57 @@
 Enkel (JVM based language)
 =======
 
-This repo is just practice code base of [Creating JVM language](http://jakubdziworski.github.io/enkel/2016/03/10/enkel_first.html), the original repo is [here](https://github.com/JakubDziworski/Enkel-JVM-language),
+Enkel is a simple programming language running on the jvm
 
-which based on maven, this repo has changed to gradle.
 
+## Build & Run
+- Generate parser code from ANTLR
+  `./gradlew :antlr:generateGrammarSource `
+
+- Compile `*.enk` to `*.class`    
+  Using IDEA 
+
+- Run
+  `java *.class`
+
+## Example
 
+- Input(`Fields.enl`)
+ ```
+Fields {
+ int field
+ start {
+    field = 5
+    print field
+ }
+}
+```
 
+- Output(`Fields.class`)
 
+Decompiled form:
+```
+public class Fields {
+    public int field;
+
+    public void start() {
+        this.field = 5;
+        System.out.println(this.field);
+    }
+
+    public Fields() {
+    }
+
+    public static void main(String[] var0) {
+        (new Fields()).start();
+    }
+}
+```
+
+Other examples please see `./EnkelExamples/*.enk`
+
+## TODO
+- [ ] Other grammar feature
+- [ ] IDEA highlight plugin
+- [ ] Support debugger
+- [ ] Port to LLVM IR