diff --git a/inc/App.hpp b/inc/App.hpp
index aa7445f..0162b5c 100644
--- a/inc/App.hpp
+++ b/inc/App.hpp
@@ -1,13 +1,13 @@
-#include <array>
+#include <vector>
 #include "Tree.hpp"
 
 class App
 {
 
 public:
-  App(int screenWidth, int screenHeight);
+  App() = default;
   ~App() = default;
-  void init();
+  void init(int screenWidth, int screenHeight);
   void update();
   void draw();
   void deinit();
@@ -15,7 +15,7 @@ public:
 private:
   int pos = 0;
   int screenWidth, screenHeight;
-  std::array<Tree, 2> trees;
+  std::vector<Tree> trees;
   Vector2 center;
   float rotation = 0.0f;
   Rectangle destB;
diff --git a/src/App.cpp b/src/App.cpp
index 2f6699d..8c04266 100644
--- a/src/App.cpp
+++ b/src/App.cpp
@@ -6,12 +6,13 @@
 #include "raylib.h"
 #include "raymath.h"
 
-App::App(int screenWidth, int screenHeight) : screenWidth(screenWidth), screenHeight(screenHeight), trees({Tree(screenWidth), Tree(screenWidth)})
+void App::init(int screenWidth, int screenHeight)
 {
-}
+  this->screenWidth = screenWidth;
+  this->screenHeight = screenHeight;
+  trees.emplace_back(screenWidth);
+  trees.emplace_back(screenWidth);
 
-void App::init()
-{
   for (auto &&tree : trees)
     tree.newTree();
 
@@ -20,7 +21,6 @@ void App::init()
   destA = CalculateRect(center, rotation, screenWidth, screenWidth);
   destB = {destA.x, destA.y, (float)screenWidth, (float)screenWidth};
 }
-
 void App::update()
 {
   if (IsMouseButtonDown(MOUSE_BUTTON_LEFT))
diff --git a/src/main.cpp b/src/main.cpp
index 2e107ac..2818fcb 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -16,8 +16,8 @@ int main(void)
 #endif
   SetTargetFPS(60);
 
-  App app(screenWidth, screenHeight);
-  app.init();
+  App app;
+  app.init(screenWidth, screenHeight);
   while (!WindowShouldClose())
   {
     app.update();