diff --git a/array_diff.rb b/array_diff.rb
new file mode 100644
index 0000000..d718df1
--- /dev/null
+++ b/array_diff.rb
@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+# It should remove all values from list a, which are present in list b keeping their order.
+
+def array_diff(array_a, array_b)
+  array_b.each { |i| array_a.delete(i) }
+  array_a
+end
+
+array_diff([1, 2], [1])
+array_diff([1, 2, 2], [1])