diff --git a/Cargo.toml b/Cargo.toml
index f7c08af..0813353 100755
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -21,3 +21,7 @@ hal = { package = "stm32l0xx-hal", version = "0.10.0", features = [
 name = "nucleo-l053r8-blink"
 test = false
 bench = false
+
+[profile.release]
+opt-level = 'z' # turn on maximum optimizations. We only have 64kB
+lto = true      # Link-time-optimizations for further size reduction
diff --git a/Embed.toml b/Embed.toml
new file mode 100755
index 0000000..e7f2de7
--- /dev/null
+++ b/Embed.toml
@@ -0,0 +1,13 @@
+# i dont think this is used anywhere but am paranoid
+
+[default.general]
+chip = "STM32L053R8"
+
+[default.rtt]
+enabled = true
+
+[default.probe]
+protocol = "Swd"
+
+[default.gdb]
+enabled = false
diff --git a/build.rs b/build.rs
deleted file mode 100755
index 549a70a..0000000
--- a/build.rs
+++ /dev/null
@@ -1,9 +0,0 @@
-// We could do a lot of fancy build tricks here, but all we need is a linker script from
-// cortext-m-rt to include our memory map, so the tools know how much RAM and flash the chip has
-// and where to find them.
-fn main() {
-    // Set the linker script to the one provided by cortex-m-rt.
-    println!("cargo:rustc-link-arg=-Tlink.x");
-
-    // Apperently, this loads the memory map provided in `memory.x`
-}
diff --git a/src/main.rs b/src/main.rs
index 21daf2b..62711ad 100755
--- a/src/main.rs
+++ b/src/main.rs
@@ -3,27 +3,41 @@
 
 // We need to use cortex_m here so the linker can find it's critical-section, but we import is as
 // an underscore since we don't directly use any of its symbols.
-use cortex_m as _;
-use cortex_m::delay::Delay;
+extern crate cortex_m;
 
 // The entry import gives us a macro to indicate where the microcontroller should start the
 // program, and also sets up the FPU on our Cortex-M4F.
 use cortex_m_rt::entry;
 
+use hal::{pac, prelude::*, rcc::Config};
 // Provides functions that allow printing back to probe-rs.
 use panic_rtt_target as _;
-use rtt_target::{rprintln, rtt_init_print};
-
-use hal as _;
+// use rtt_target::{rprintln, rtt_init_print};
 
 // Start here, and don't ever return from this function.
 #[entry]
 fn main() -> ! {
-    // Initialise our debug printer.
-    rtt_init_print!();
-    // Send a message back via the debugger.
-    rprintln!("Hello, world!");
+    let dp = pac::Peripherals::take().unwrap();
 
-    // Do nothing, forever.
-    loop {}
+    // Configure the clock.
+    let mut rcc = dp.RCC.freeze(Config::hsi16());
+
+    // Acquire the GPIOA peripheral. This also enables the clock for GPIOA in
+    // the RCC register.
+    let gpioa = dp.GPIOA.split(&mut rcc);
+
+    // Configure PA1 as output.
+    let mut led = gpioa.pa3.into_push_pull_output();
+
+    loop {
+        // Set the LED high one million times in a row.
+        for _ in 0..1_000_000 {
+            led.set_high().unwrap();
+        }
+
+        // Set the LED low one million times in a row.
+        for _ in 0..1_000_000 {
+            led.set_low().unwrap();
+        }
+    }
 }