diff --git a/bluepill-rs/src/dmx.rs b/bluepill-rs/src/dmx.rs
index c1784c8..9b4dc33 100644
--- a/bluepill-rs/src/dmx.rs
+++ b/bluepill-rs/src/dmx.rs
@@ -22,7 +22,7 @@ impl DMX {
     where
         PINS: serial::Pins<pac::USART1>,
     {
-        let _ = serial.reconfigure(250_000.bps(), &clocks);
+        serial.reconfigure(250_000.bps(), &clocks).unwrap();
 
         Self::Idle(DMXIdle {
             tx: Some(serial.tx.with_dma(channel)),
diff --git a/bluepill-rs/src/main.rs b/bluepill-rs/src/main.rs
index 5b21814..2fd77e8 100644
--- a/bluepill-rs/src/main.rs
+++ b/bluepill-rs/src/main.rs
@@ -72,6 +72,8 @@ mod app {
             &clocks,
         );
 
+        foo::spawn().unwrap();
+
         (
             Shared {
                 buffer: singleton!(: [u8; 512] = [0b01010101; 512]).unwrap(),
@@ -90,18 +92,24 @@ mod app {
         )
     }
 
-    #[idle(local = [dmx, delay_us, led], shared = [&buffer])]
-    fn idle(cx: idle::Context) -> ! {
+    #[idle]
+    fn idle(_: idle::Context) -> ! {
         loop {
-            cx.local.dmx.send(cx.shared.buffer);
-
-            cx.local.delay_us.delay(1.secs());
-            cx.local.led.set_high();
-
-            cx.local.delay_us.delay(1.secs());
-            cx.local.led.set_low();
-
-            cx.local.dmx.wait();
+            cortex_m::asm::nop();
         }
     }
+
+    #[task(local = [dmx, delay_us, led], shared = [&buffer])]
+    fn foo(cx: foo::Context) {
+        cx.local.dmx.send(cx.shared.buffer);
+
+        cx.local.led.set_low();
+        cx.local.delay_us.delay(1.secs());
+
+        cx.local.led.set_high();
+        cx.local.delay_us.delay(1.secs());
+
+        cx.local.dmx.wait();
+        foo::spawn().unwrap();
+    }
 }