Update file week09.md

docs/assignments/week09.md

@@ -239,6 +239,8 @@ Part 2: a base layer and frames to give thickness to the silicon
 
 ![plexiglass](../images/week09/plexiglass.jpg){ width=1000}
 
+Glue the layers together with a super glue and start casting.
+
 ![mold](../images/week09/mold.jpg){ width=1000}
 
 ![mold](../images/week09/flowermold.jpg){ width=1000}