diff --git a/desktop/sources/scripts/library.js b/desktop/sources/scripts/library.js
index 0d0c012..a1fd99e 100644
--- a/desktop/sources/scripts/library.js
+++ b/desktop/sources/scripts/library.js
@@ -70,6 +70,10 @@ function Library (ronin) {
     return arr[0]
   }
 
+  this.last = (arr) => {
+    return arr[arr.length - 1]
+  }
+
   this.rest = ([_, ...arr]) => {
     return arr
   }
diff --git a/examples/benchmark.lisp b/examples/benchmark.lisp
index 7a51145..f209af8 100644
--- a/examples/benchmark.lisp
+++ b/examples/benchmark.lisp
@@ -13,4 +13,14 @@
   (test "mod" (mod 6 4) 2)
   (test "clamp" (clamp 12 4 8) 8)
   (test "step" (step 12 10) 10)
+
+; Logic
+
+  (test "lt" (lt 3 4) true)
+  (test "gt" (gt 3 4) false)
+
+; Arrays
+
+  (test "first" (first ("a" "b" "c")) "a")
+  (test "last" (last ("a" "b" "c")) "c")
 )
\ No newline at end of file