diff --git a/vars/caution.groovy b/vars/caution.groovy
new file mode 100644
index 0000000..97e4fe9
--- /dev/null
+++ b/vars/caution.groovy
@@ -0,0 +1,5 @@
+def call(String name = 'human') {
+    // Any valid steps can be called from this code, just like in other
+    // Scripted Pipeline
+    echo "Warning, ${name}."
+}
\ No newline at end of file