diff --git a/Makefile b/Makefile
index e1db116..ee012e0 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
-CFLAGS+=-DF_CPU=16000000
+CFLAGS+=-DF_CPU=16000000 -O0
 AVR_FUSE_LOW=0xDE
 AVR_FUSE_HIGH=0xD1
-AVR_FUSE_EXTENDED=0xF0
+AVR_FUSE_EXTENDED=0xC0
 
 DEPENDS=avr-fw-modules/cpu/atmega32u4
 
diff --git a/bin/.swp b/bin/.swp
new file mode 100644
index 0000000..00a8ee5
Binary files /dev/null and b/bin/.swp differ
diff --git a/src/main.c b/src/main.c
index 39e8d1f..0b5a8b4 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,6 +1,30 @@
-
+#include <avr/io.h>
 
 int main(void)
 {
 	
+	//Taster-pin == input (-> pull-up/ oder nicht)
+	//if(Taster) -> PORTC = _BV(7)
+	
+	DDRC = 0xf0;
+	PORTC = 0x00;
+	
+	DDRE = 0x00;
+	PORTE = 0x00;
+	
+	unsigned long i = 0;
+	
+	while(1)
+	{
+			if(PINE & 0x04)
+				PORTC &= ~_BV(6);
+			else
+				PORTC |= _BV(6);
+			
+			if((i++ % 10000) <= 5000)
+				PORTC &= ~_BV(7);
+			else
+				PORTC |= _BV(7);	
+	}
+	return 0;
 }