diff --git a/README.md b/README.md
index 0c84efc..bb44023 100644
--- a/README.md
+++ b/README.md
@@ -2,4 +2,15 @@
 
 Created by iterating `z' = ln(-z) / ln(z)`.
 
+Usage:
+
+```bash
+git clone https://git.signorovitch.org/jacob/ln-fractal && cd ln-fractal
+make
+```
+
+This will generate a series of frames zooming into the fractal (default is
+200), and link them together into a video. May take a while to run, depending
+on your CPU.
+
 ![h.png](h.png)