diff --git a/task-20-sub-01.js b/task-20-sub-01.js
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index 0000000..e69de29
diff --git a/task-20-sub-02.js b/task-20-sub-02.js
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index 0000000..e69de29
diff --git a/task-20.js b/task-20.js
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index 0000000..e69de29
diff --git a/task-21-sub-01.js b/task-21-sub-01.js
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diff --git a/task-21.js b/task-21.js
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--- /dev/null
+++ b/task-21.js
@@ -0,0 +1,3 @@
+/**
+ * Completed task 21
+ */