diff --git a/src/main_blink.cc b/src/main_blink.cc
index cac3593..a3fb4e4 100644
--- a/src/main_blink.cc
+++ b/src/main_blink.cc
@@ -1,16 +1,31 @@
 #include "daisy_seed.h"
+#include "types.hh"
 
-namespace ld = daisy;
+namespace Heck {
+    namespace Constants {
+        constexpr float BLINK_FREQ_HZ{ 1 };
+    }
+
+    ld::DaisySeed hw{};
+
+    float hz_to_ms(float hz)
+    {
+        return 1000. / hz;
+    }
 
-static ld::DaisySeed hw{};
+    int main()
+    {
+        hw.Init();
+        while (true) {
+            hw.SetLed(true);
+            hw.DelayMs(hz_to_ms(Constants::BLINK_FREQ_HZ * 2));
+            hw.SetLed(false);
+            hw.DelayMs(hz_to_ms(Constants::BLINK_FREQ_HZ * 2));
+        }
+    }
+} // namespace Heck
 
 int main()
 {
-    hw.Init();
-    while (true) {
-        hw.SetLed(true);
-        hw.DelayMs(100);
-        hw.SetLed(false);
-        hw.DelayMs(100);
-    }
+    return Heck::main();
 }