Reorganize

led1/led1.c

@@ -0,0 +1,18 @@
+#include <avr/io.h>
+#include <util/delay.h>
+#include <limits.h>
+
+int main(void) {
+    int i;
+
+    DDRB = 0xff;
+
+    PORTB = 0b10101010;
+
+    for (;;) {
+        PORTB = PORTB ^ 0xff;
+        _delay_ms(1000);
+    }
+
+    return 0;
+}