diff --git a/src/main.rs b/src/main.rs
index 61442dd..46d5a29 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,12 +1,32 @@
 use raylib::prelude::*;
 
+const WINDOW_WIDTH: i32 = 640;
+const WINDOW_HEIGHT: i32 = 480;
+
+fn convert_coordinates(pos_x: f32, pos_y: f32) -> (i32, i32) {
+    return (
+        ((WINDOW_WIDTH as f32) * ((pos_x + 1.0) / 2.0)) as i32,
+        ((WINDOW_HEIGHT as f32) * ((pos_y + 1.0) / 2.0)) as i32,
+    );
+}
+
+fn draw_point(d: &mut RaylibDrawHandle, pos_x: f32, pos_y: f32) {
+    const POINT_SIZE: i32 = 3;
+    let (window_x, window_y) = convert_coordinates(pos_x, pos_y);
+    d.draw_rectangle(window_x, window_y, POINT_SIZE, POINT_SIZE, Color::RED);
+}
+
 fn main() {
-    let (mut rl, thread) = raylib::init().size(640, 480).title("Hello, World").build();
+    let (mut rl, thread) = raylib::init().size(WINDOW_WIDTH, WINDOW_HEIGHT).build();
 
     while !rl.window_should_close() {
         let mut d = rl.begin_drawing(&thread);
 
+        draw_point(&mut d, -0.5, -0.5);
+        draw_point(&mut d, 0.5, -0.5);
+        draw_point(&mut d, 0.5, 0.5);
+        draw_point(&mut d, -0.5, 0.5);
+
         d.clear_background(Color::WHITE);
-        d.draw_text("Hello, world!", 12, 12, 20, Color::BLACK);
     }
 }