add example to README

README.md

@@ -4,4 +4,24 @@ This is a library, with an API inspired by [timer.rs](https://github.com/Yoric/t
 [![Documentation](https://docs.rs/synchronous-timer/badge.svg)](https://docs.rs/synchronous-timer)
 [![crates.io](https://img.shields.io/crates/v/synchronous-timer.svg)](https://crates.io/crates/synchronous-timer)
 
+Example:
+
+```rust
+use std::time::Duration;
+use synchronous_timer::Timer;
+
+fn main() {
+    let mut timer = Timer::new();
+    timer
+        .schedule_in(Duration::from_secs(5), || {
+            println!("I will run on the background thread in 5 seconds")
+        })
+        .detach();
+    timer.schedule_immediately(|| println!("I will run on the background thread right now"));
+    let handle = timer.schedule_in(Duration::from_secs(1), || println!("I will never run"));
+    drop(handle);
+    std::thread::sleep(Duration::from_secs(6));
+}
+```
+
 This work is licensed under the ISC license, a copy of which can be found in [LICENSE.txt](LICENSE.txt).