1 files changed, 31 insertions, 0 deletions
diff --git a/main.c b/main.c
new file mode 100644
index 0000000..1911237
--- /dev/null
+++ b/main.c
@@ -0,0 +1,31 @@
+#include <avr/io.h>
+#include <avr/wdt.h>
+#include <util/delay.h>
+#include <stdlib.h>
+
+int main (void)
+{
+	unsigned int i, j, h;
+	wdt_disable();
+
+	DDRB = 0xff;
+	DDRD = 0xff;
+
+	PORTB = 0;
+	PORTD = 0;
+
+	while (1) {
+		for (i = 1; i < 256; i *= 2) {
+			PORTB = i;
+			for (j = 1; j < 256; j *= 2) {
+				PORTD = ~j;
+				for (h = 1; h < 1; h++) { // use "h < 4096" for visible pixels (e.g. finding soldering errors)
+					asm("nop");
+				}
+			}
+			PORTB = 0;
+		}
+	}
+
+	return 0;
+}