diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..11ea4b2
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,52 @@
+use std::thread;
+
+pub struct ThreadPool{
+    workers: Vec<Worker>,
+}
+
+impl ThreadPool{
+    /// Create a new ThreadPool.
+    ///
+    /// The size is the number of threads in the pool.
+    ///
+    /// # Panics
+    ///
+    /// The `new` function will panic if the size is zero.
+    pub fn new(size: usize) -> ThreadPool {
+        assert!(size > 0);
+        
+        let mut workers = Vec::with_capacity(size);
+
+        for id in 0..size {
+            // create some threads and store them in the vector
+            workers.push(Worker::new(id));
+        }
+
+        ThreadPool {
+            workers
+        }
+    }
+
+    pub fn execute<F>(&self, f: F)
+        where
+            F: FnOnce() + Send + 'static
+    {
+
+    }
+}
+
+struct Worker {
+    id: usize,
+    thread: thread::JoinHandle<()>,
+}
+
+impl Worker {
+    fn new(id: usize) -> Worker {
+        let thread = thread::spawn(|| {});
+
+        Worker {
+            id,
+            thread,
+        }
+    }
+}