diff --git a/erlang.iml b/erlang.iml
new file mode 100644
index 0000000..c023176
--- /dev/null
+++ b/erlang.iml
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="ERLANG_MODULE" version="4">
+  <component name="FacetManager">
+    <facet type="erlang" name="Erlang">
+      <configuration />
+    </facet>
+  </component>
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/test" isTestSource="true" />
+    </content>
+    <orderEntry type="jdk" jdkName="Erlang 25" jdkType="Erlang SDK" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/src/fib.erl b/src/fib.erl
new file mode 100644
index 0000000..898841d
--- /dev/null
+++ b/src/fib.erl
@@ -0,0 +1,7 @@
+-module(fib).
+-export([fib_p/1]).
+
+% Сопоставление с образцом
+fib_p(0) -> 0;
+fib_p(1) -> 1;
+fib_p(N) -> fib_p(N - 1) + fib_p(N - 2).
\ No newline at end of file
diff --git a/test/fib_test.erl b/test/fib_test.erl
new file mode 100644
index 0000000..e0d3c40
--- /dev/null
+++ b/test/fib_test.erl
@@ -0,0 +1,13 @@
+%%%-------------------------------------------------------------------
+%%% @author ivan
+%%% @copyright (C) 2023, self
+%%% @doc
+%%%
+%%% @end
+%%% Created : 09. Feb 2023 23:52
+%%%-------------------------------------------------------------------
+-module(fib_test).
+-include_lib("eunit/include/eunit.hrl").
+
+simple_test() ->
+  ?assert(true).