diff --git a/README.md b/README.md
index a37dcb3..6936fec 100644
--- a/README.md
+++ b/README.md
@@ -6,5 +6,5 @@ initial test.scad is by [Dr. Laura Taalman](https://mathgrrl.com/hacktastic/2019
 
 how to use:
 1. modify the "patterndata.scad" file (edit the 0's and 1's)
-2. open test.scad in openscad
+2. open test.scad in openscad and render it
 3. click [file] -> [export] -> [export as svg...]
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