diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -16,3 +16,7 @@ Inkscape extension for Knox Makers to drive HPGL based vinyl/plotter devices ove
 3) Restart Inkscape, then find the extension under **Extensions -> Knox Makers -> KM Plot**.
 
 4) Connect your plotter via USB/serial; select the detected port in the Device tab, adjust settings as needed, and click **Send to plotter**.
+
+## Demo
+
+![KM Plot demo](docs/km-plot.gif)
diff --git a/docs/km-plot.gif b/docs/km-plot.gif
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index 0000000..2f80bd7
Binary files /dev/null and b/docs/km-plot.gif differ