diff --git a/src/elements/mod.rs b/src/elements/mod.rs
new file mode 100644
index 0000000..39a450e
--- /dev/null
+++ b/src/elements/mod.rs
@@ -0,0 +1,9 @@
+use crate::widget::Element;
+
+pub struct Rect;
+
+impl Element for Rect {
+    fn render(&mut self, scope: &mut crate::render::RenderScope) {
+        scope.draw_rect();
+    }
+}
diff --git a/src/lib.rs b/src/lib.rs
index 6f87071..6a1b612 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,12 +1,28 @@
+pub mod elements;
+pub mod render;
+pub mod widget;
+
+use std::sync::{Arc, Mutex};
+
 use minifb::Window;
 
+use crate::{render::RenderScope, widget::Element};
+
 pub struct App {
     window: Window,
+    elements: Vec<Arc<Mutex<Box<dyn Element>>>>,
 }
 
 impl App {
     pub fn new(win: Window) -> Self {
-        Self { window: win }
+        Self {
+            window: win,
+            elements: Vec::new(),
+        }
+    }
+
+    pub fn element<E: Element + 'static>(&mut self, e: E) {
+        self.elements.push(Arc::new(Mutex::new(Box::new(e))));
     }
 
     pub fn run(&mut self) {
@@ -17,13 +33,14 @@ impl App {
 
     fn render(&mut self) {
         let (w, h) = self.window.get_size();
-        let mut buffer = vec![0; w * h];
-        for y in 100..200 {
-            for x in 150..300 {
-                buffer[y * h + x] = 0xFF00FF;
-            }
+        let mut scope = RenderScope::new(w, h);
+
+        for e in &self.elements {
+            e.lock().unwrap().render(&mut scope);
         }
 
-        self.window.update_with_buffer(&buffer, w, h).unwrap();
+        self.window
+            .update_with_buffer(&scope.get_buffer(), w, h)
+            .unwrap();
     }
 }
diff --git a/src/main.rs b/src/main.rs
index d756f7d..28fdba6 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,10 +1,12 @@
 use minifb::{Window, WindowOptions};
-use osgui::App;
+use osgui::{elements::Rect, App};
 
 fn main() {
     let window = Window::new("minifb example", 500, 500, WindowOptions::default()).unwrap();
 
     let mut app = App::new(window);
 
+    app.element(Rect);
+
     app.run();
 }
diff --git a/src/render.rs b/src/render.rs
new file mode 100644
index 0000000..d9b71da
--- /dev/null
+++ b/src/render.rs
@@ -0,0 +1,27 @@
+pub struct RenderScope {
+    buffer: Vec<u32>,
+    width: usize,
+    height: usize,
+}
+
+impl RenderScope {
+    pub fn new(w: usize, h: usize) -> Self {
+        Self {
+            buffer: vec![0; w * h],
+            width: w,
+            height: h,
+        }
+    }
+
+    pub fn draw_rect(&mut self) {
+        for y in 0..200 {
+            for x in 0..200 {
+                self.buffer[y * self.height + x] = 0xFF00FF;
+            }
+        }
+    }
+
+    pub fn get_buffer(&self) -> Vec<u32> {
+        self.buffer.clone()
+    }
+}
diff --git a/src/widget.rs b/src/widget.rs
new file mode 100644
index 0000000..f9c9618
--- /dev/null
+++ b/src/widget.rs
@@ -0,0 +1,5 @@
+use crate::render::RenderScope;
+
+pub trait Element {
+    fn render(&mut self, scope: &mut RenderScope);
+}