diff --git a/led2/led2.c b/led2/led2.c
index 464ab94..d4a07f8 100644
--- a/led2/led2.c
+++ b/led2/led2.c
@@ -2,24 +2,28 @@
 #include <util/delay.h>
 #include <limits.h>
 
-#define DELAY 50
-#define BITS sizeof(PORTB) * CHAR_BIT - 1
+#define DELAY 75
+#define LEN sizeof(PORTB) * CHAR_BIT - 1
+#define LED_DDR DDRB
+#define LED_PORT PORTB
 
 int main(void) {
-    int i;
+    uint8_t i;
 
-    DDRB = 0xff;
-
-    PORTB = 1;
+    LED_DDR = 0xff;
 
     for (;;) {
-        for (i = 0; i < BITS; i++) {
+        for (i = 0; i < LEN; i++) {
             _delay_ms(DELAY);
-            PORTB = PORTB << 1;
+            LED_PORT = (1 << i);
+            // LED_PORT = ~(1 << i);
+            // LED_PORT |= (1 << i);
         }
-        for (i = BITS; i > 0; i--) {
+        for (i = LEN; i > 0; i--) {
             _delay_ms(DELAY);
-            PORTB = PORTB >> 1;
+            LED_PORT = (1 << i);
+            // LED_PORT = ~(1 << i);
+            // LED_PORT |= (1 << i);
         }
     }