diff --git a/desktop/sources/scripts/library.js b/desktop/sources/scripts/library.js
index 083282e..f054041 100644
--- a/desktop/sources/scripts/library.js
+++ b/desktop/sources/scripts/library.js
@@ -28,10 +28,19 @@ function Library (ronin) {
     console.log(...args)
   }
 
+  // Arrays
   this.map = (fn, arr) => {
     return arr.map(fn)
   }
 
+  this.first = (arr) => {
+    return arr[0]
+  }
+
+  this.rest = ([_, ...arr]) => {
+    return arr
+  }
+
   // Rects
 
   this.pos = (x, y, t = 'pos') => {
diff --git a/examples/arrays.lisp b/examples/arrays.lisp
index 97fad47..76306e6 100644
--- a/examples/arrays.lisp
+++ b/examples/arrays.lisp
@@ -1,5 +1,10 @@
 (print (map (lambda (a) (add a 1)) (1 2 3)))
 
+(
+  (print (first (1 2 3)))
+  (print (rest (1 2 3)))
+)
+
 (
   (clear) 
   (map (lambda (a)