diff --git a/build.cpp b/build.cpp
index 7457d62..059e83f 100644
--- a/build.cpp
+++ b/build.cpp
@@ -15,7 +15,6 @@ int main(int argc, char const *argv[])
   {
     if (!std::strcmp(argv[i], "opt"))
     {
-      opt_flags = "-O3";
       opt = true;
     }
     if (!std::strcmp(argv[i], "build"))
@@ -24,13 +23,18 @@ int main(int argc, char const *argv[])
     if (!std::strcmp(argv[i], "run"))
       run = true;
 
-    if (!std::strcmp(argv[i], "cla"))
+    if (!std::strcmp(argv[i], "clear"))
     {
-      clear_all_build();
       clear = true;
     }
   }
 
+  if (clear)
+  {
+    clear_all_build();
+  }
+
+  // clean recompile of code
   if (clear && !build)
   {
     return 0;
@@ -38,32 +42,35 @@ int main(int argc, char const *argv[])
 
   std::filesystem::create_directory(OBJ_DIR);
 
-  if (!opt)
+  if (opt)
   {
-
-    int res = compile_src_dir();
-
-    switch (res)
-    {
-    case 1:
-      compile_obj_dir();
-      break;
-    case -1:
-      return 0;
-    }
-
-    if (!std::filesystem::exists(BUILD_FILE))
-      compile_obj_dir();
+    opt_flags = "-O3";
+    build_as_one();
   }
   else
   {
-    build_as_one();
+    int res = compile_src_dir();
+    switch (res)
+    {
+      // correcty recompile
+    case 1:
+      compile_obj_dir();
+      break;
+      // failed recompile
+    case -1:
+      return 0;
+      // no need for recompile
+    case 0:
+      break;
+    }
+    // files dont need to recompile but exe is mising
+    if (!std::filesystem::exists(BUILD_FILE))
+      compile_obj_dir();
   }
 
   if (run)
   {
-    command = {"./" + BUILD_FILE.string(), "Pot", "20", "1080"};
-    nob_cmd_run_sync(command);
+    run_main();
   }
   return 0;
 }
diff --git a/build.hpp b/build.hpp
index ae9576b..00b91d2 100644
--- a/build.hpp
+++ b/build.hpp
@@ -7,6 +7,8 @@
 #include <fstream>
 #include <unordered_set>
 
+// #define EXT_ARGS
+// #define EXT_LINK
 // #define EXT_INC
 // #define EXT_OBJ
 // #define NO_Werror
@@ -14,10 +16,17 @@
 std::filesystem::path OBJ_DIR = "obj";
 std::filesystem::path INC_DIR = "include";
 std::filesystem::path SRC_DIR = "source";
-std::filesystem::path BUILD_FILE = "main";
 
+#ifdef _WIN32
+std::filesystem::path BUILD_FILE = "main.exe";
+std::string cpp_compiler = "zig c++";
+std::string c_compiler = "zig cc";
+#else
+std::filesystem::path BUILD_FILE = "main";
 std::string cpp_compiler = "g++";
 std::string c_compiler = "gcc";
+#endif
+
 std::string opt_flags = "-ggdb";
 std::vector<std::string> command;
 
@@ -81,7 +90,7 @@ void print_command(std::vector<std::string> &arguments)
   printf("\n");
 }
 
-bool nob_cmd_run_sync(std::vector<std::string> &arguments)
+bool run_command(std::vector<std::string> &arguments)
 {
   print_command(arguments);
   std::string command = "";
@@ -109,8 +118,7 @@ bool check_if_rebuild(const std::filesystem::path &org_path, const std::filesyst
 
 bool rebuild_my_self(std::filesystem::path src_path, int argc, const char **exec_path)
 {
-  std::string p = exec_path[0];
-  std::filesystem::path exec = p;
+  std::filesystem::path exec = exec_path[0];
 
   if (!check_if_rebuild(src_path, exec) && !check_if_rebuild(__FILE__, exec))
     return false;
@@ -122,10 +130,10 @@ bool rebuild_my_self(std::filesystem::path src_path, int argc, const char **exec
     input.push_back(exec_path[i]);
 
   std::vector<std::string> comand = {cpp_compiler, src_path.string(), "-o", exec_path[0], "-g"};
-  if (!nob_cmd_run_sync(comand))
+  if (!run_command(comand))
     return false;
 
-  if (!nob_cmd_run_sync(input))
+  if (!run_command(input))
     return false;
 
   printf("rebuild\n");
@@ -137,17 +145,17 @@ bool rebuild_my_self(std::filesystem::path src_path, int argc, const char **exec
   return true;
 }
 
-struct nob_directory
+struct all_in_directory
 {
   std::vector<std::filesystem::path> files;
   std::vector<std::filesystem::path> dirs;
 };
 
-nob_directory get_all_files_in_dir(std::filesystem::path directory_path)
+all_in_directory get_all_files_in_dir(std::filesystem::path directory_path)
 {
   namespace fs = std::filesystem;
 
-  nob_directory dir;
+  all_in_directory dir;
   if (!fs::is_directory(directory_path))
     return dir;
 
@@ -192,8 +200,11 @@ std::vector<std::string> get_includes(const std::filesystem::path &path)
     if (line[0] != '#')
       break;
 
+    // if include ends with " its my .h
     if (line[line.size() - 1] == '\"')
     {
+      // magic num 10 is lenOf(#include ") so start at 10 until end of
+      // line witch is len of line - 10 - 1 of cahar "
       ret.push_back(line.substr(10, line.length() - 10 - 1));
     }
   }
@@ -203,8 +214,8 @@ std::vector<std::string> get_includes(const std::filesystem::path &path)
 
 void clear_all_build()
 {
-  std::filesystem::remove(OBJ_DIR);
-  std::filesystem::remove(BUILD_FILE);
+  std::filesystem::remove_all(OBJ_DIR);
+  std::filesystem::remove_all(BUILD_FILE);
 }
 
 #ifdef EXT_INC
@@ -213,8 +224,8 @@ int compile_src_dir(std::vector<std::string> ext_inc)
 int compile_src_dir()
 #endif
 {
-  nob_directory src_dir = get_all_files_in_dir(SRC_DIR);
-  nob_directory obj_dir;
+  all_in_directory src_dir = get_all_files_in_dir(SRC_DIR);
+  all_in_directory obj_dir;
 
   for (auto &&i : src_dir.dirs)
   {
@@ -222,7 +233,7 @@ int compile_src_dir()
   }
 
   std::unordered_set<std::string> modified_heders;
-  nob_directory inc_dir = get_all_files_in_dir(INC_DIR);
+  all_in_directory inc_dir = get_all_files_in_dir(INC_DIR);
 
   for (size_t i = 0; i < inc_dir.files.size(); i++)
   {
@@ -260,9 +271,11 @@ int compile_src_dir()
     std::filesystem::path tmp = i;
     std::filesystem::path out = OBJ_DIR / tmp.replace_extension(".o");
     bool reb = false;
+    // check if .cpp changed
     if (check_if_rebuild(i, out))
       reb = true;
 
+    // if .cpp didnt change check include files changed
     if (!reb)
     {
       std::vector<std::string> incudes = get_includes(i);
@@ -280,7 +293,7 @@ int compile_src_dir()
     {
       command[src_loc] = i.string();
       command[obj_loc] = out.string();
-      if (!nob_cmd_run_sync(command))
+      if (!run_command(command))
         return -1;
 
       build = 1;
@@ -289,9 +302,13 @@ int compile_src_dir()
   return build;
 }
 
+#if defined(EXT_LINK)
+void compile_obj_dir(std::vector<std::string> ext_link)
+#else
 void compile_obj_dir()
+#endif
 {
-  nob_directory obj_dir = get_all_files_in_dir(OBJ_DIR);
+  all_in_directory obj_dir = get_all_files_in_dir(OBJ_DIR);
 
   command.clear();
   command.push_back(cpp_compiler);
@@ -304,7 +321,11 @@ void compile_obj_dir()
   command.push_back("-o");
   command.push_back(BUILD_FILE.string());
 
-  nob_cmd_run_sync(command);
+#if defined(EXT_LINK)
+  command.insert(command.end(), ext_link.begin(), ext_link.end());
+#endif
+
+  run_command(command);
 }
 
 #if defined(EXT_OBJ) && defined(EXT_INC)
@@ -317,7 +338,7 @@ void build_as_one(std::vector<std::string> ext_inc)
 void build_as_one()
 #endif
 {
-  nob_directory src_dir = get_all_files_in_dir(SRC_DIR);
+  all_in_directory src_dir = get_all_files_in_dir(SRC_DIR);
 
   command.clear();
   command.push_back(cpp_compiler);
@@ -343,5 +364,24 @@ void build_as_one()
 #ifdef EXT_OBJ
   command.insert(command.end(), ext_obj.begin(), ext_obj.end());
 #endif
-  nob_cmd_run_sync(command);
+  run_command(command);
+}
+
+#ifdef EXT_ARGS
+bool run_main(std::vector<std::string> ext_args)
+#else
+bool run_main()
+#endif
+{
+  command.clear();
+#ifndef _WIN32
+  command.push_back("./");
+#endif
+  command.push_back(BUILD_FILE.string());
+
+#ifdef EXT_ARGS
+  command.insert(command.end(), ext_args.begin(), ext_args.end());
+#endif
+
+  return run_command(command);
 }
\ No newline at end of file