diff --git a/Exercises/1-seq.js b/Exercises/1-seq.js
index bdf0fe8..1e9171a 100644
--- a/Exercises/1-seq.js
+++ b/Exercises/1-seq.js
@@ -1,5 +1,6 @@
 'use strict';
 
-const seq = f => g => x => 0;
+const seq = f => g =>
+  ((typeof g === 'number') ? f(g) : seq(x => f(g(x))));
 
 module.exports = { seq };