diff --git a/src/gympal.c b/src/gympal.c
index 4025db6..a0d766b 100644
--- a/src/gympal.c
+++ b/src/gympal.c
@@ -1,15 +1,19 @@
 #include <avr/io.h>
 #include <util/delay.h>
 
+void updatePin12(uint8_t status) {
+    PORTB = status << PORTB4;
+}
+
 int main() {
     // Pin 12 == Port B4, aka 4th bit on the B register.
     // Set pin 12 as output.
     DDRB = 1 << PORTB4;
-    // Set pin 12 as HIGH.
-    PORTB = 1 << PORTB4;
-    // Delay for 1 second.
-    _delay_ms(1000.0);
-    // Set pin 12 as LOW.
-    PORTB = 0 << PORTB4;
+    uint8_t ledOn = 1;
+    while (1) {
+        updatePin12(ledOn);
+        ledOn = !ledOn;
+        _delay_ms(1000.0);
+    }
     return 0;
 }
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