update README.md

Update sample.png

update README.md

README.md

@@ -1,6 +1,41 @@
 # pocketpy
 
-## 参考
+![build](https://github.com/blueloveTH/pocketpy/actions/workflows/main.yml/badge.svg)
+
+`pocketpy` is a C++17 single-file header-only cross platform Python Interpreter.
+
+![sample_img](docs/readme_sample.png)
+
+**CURRENTLY IN DEVELOPMENT!!**
+
+## Prebuilt Windows Binaries
+
+Go to https://github.com/blueloveTH/pocketpy/actions/workflows/main.yml to get an artifact.
+
+## Build From Source
+
+First clone the repository
+
+```bash
+git clone https://github.com/blueloveTH/pocketpy
+cd pocketpy
+```
+
+**If you want to get a single header file:**
+
+```bash
+python3 amalgamate.py
+```
+
+It will generate `pocketpy.h` and `main.cpp` in `amalgamate/` directory. You can use `main.cpp` to build a REPL console or use `pocketpy.h` only to embed it to your game engine.
+
+**If you want to do development:**
+
+```bash
+bash build_cpp.sh
+```
+
+## Reference
 
 + [cpython](https://github.com/python/cpython)