diff --git a/README.md b/README.md
index d3d38c5..631a82d 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,30 @@
 # double-pendulum
 
-Double Pendulum chaotic sim in rust + webassembly
\ No newline at end of file
+<!--toc:start-->
+
+- [double-pendulum](#double-pendulum)
+  - [Prereqs](#prereqs)
+  - [Build](#build)
+
+<!--toc:end-->
+
+Double Pendulum chaotic sim in rust + webassembly (WIP)
+
+## Prereqs
+
+- Rust toolchain (`rustup`, `cargo`, `rustc`)
+- Install [`wasm-pack`](https://github.com/wasm-bindgen/wasm-pack)
+
+## Build
+
+Package can be built using:
+
+```bash
+wasm-pack build --target web
+```
+
+Result can be viewed by hosting the directory, e.g. using:
+
+```bash
+python -m http.server 8080
+```