diff --git a/04.ls/ls1.rb b/04.ls/ls1.rb
new file mode 100644
index 0000000000..ebecdf2bfa
--- /dev/null
+++ b/04.ls/ls1.rb
@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+def list_files
+  current_path = Dir.pwd
+  folder_glob = "#{current_path}/*"
+  files = Dir.glob(folder_glob)
+  files.map { |file| File.basename(file) }
+end
+
+def print_files_in_columns(columns = 3)
+  file_list = list_files
+  max_length = file_list.map { |file| file.length }.max || 0
+  column_width = (max_length + 2)
+  rows = (file_list.length.to_f / columns).ceil
+  column_arrays = Array.new(rows){[]}
+
+  file_list.each_with_index do |file, index|
+    column_arrays[index % rows] << file
+  end
+
+  column_arrays.each do |row|
+    row.each do |col|
+      print col&.ljust(column_width)
+    end
+    puts
+  end
+end
+
+print_files_in_columns