diff --git a/firmware/main.c b/firmware/main.c
index 083c55d..aec19ac 100644
--- a/firmware/main.c
+++ b/firmware/main.c
@@ -59,23 +59,19 @@ void init()
 }
 
 // Interruptvektor von TIMER1
-//SIGNAL(SIG_OUTPUT_COMPARE1A) // alte schreibweise
 ISR (TIMER1_COMPA_vect)
 {
 
-    // Vorgang für reihenweise Ausgabe.
-    // Alle Pins von PORTD auf LOW setzen
-    // Höchstes Bit in PORTA auf 0 setzen (Leitung 9 für letzte Reihe)
-
-    // bei cube_row_offset % 3 eine Ebene weiter schalten (ABC-Leitungen durch rotieren)
-    // bei Systemstart muss A aktiviert sein.
-
-    // bits der anzuzeigenden reihe auslesen (cube & (0b00000111 << cube_row_offset))
-    // und in PORTD und Pin 8 von PORTA setzen
-
-    // cube_row_offset += 3 // immer um 3 Bits weiter springen in 32Bit Variable
-
-    // cube_row_offset auf 0 setzen wenn maximum überschritten (27-3 = 24)
+	PORTD &= 0xC7; // 0b11000111
+	PORTD |= (1 << (cube_layer + 3)); // shift "1" to bit 3,4,5 in PortD
+	PORTB = ~(cube & (0xFF << (cube_layer * 9))); // set the lines 1 to 8 negated to the port b
+	PORTD = (~(cube & (1 << cube_layer * 9 + 8)) << 6)
+	        | (PORTD & 0x7F); // 0b01111111 keep the ower 7 bits and set the 9. bit from the LEDCube data.
 
+	cube_layer++;
+	
+	if (cube_layer > 2)
+		cube_layer = 0;
+			
 }
 
diff --git a/firmware/main.h b/firmware/main.h
index 243866a..9479473 100644
--- a/firmware/main.h
+++ b/firmware/main.h
@@ -22,7 +22,7 @@
 // Cube-Data
 volatile uint32_t cube = 0x00000000;
 // Bit Offset in Cube-Data
-volatile uint8_t cube_row_offset = 0x00;
+volatile uint8_t cube_layer = 0x00;
 
 // Prototypen
 void init(void);
diff --git a/firmware/usb.c b/firmware/usb.c
index 3915e30..6c5fddf 100644
--- a/firmware/usb.c
+++ b/firmware/usb.c
@@ -12,21 +12,22 @@
 
 usbMsgLen_t usbFunctionSetup(uchar data[8])
 {
-    usbRequest_t    *rq = (void *)data;
+    usbRequest_t *rq = (void *)data;
 
     if ( (rq->bmRequestType & USBRQ_TYPE_MASK) == USBRQ_TYPE_VENDOR )
     {
         if ( rq->bRequest == CUSTOM_RQ_SET_STATUS )
         {
 
-            /*if (rq->wIndex.bytes[0] == 0)
+/*
+			if (rq->wIndex.bytes[0] == 0)
                 cube[0][0][0] = 1;
             if (rq->wIndex.bytes[0] == 1)
                 cube[0][0][1] = 1;
             if (rq->wIndex.bytes[0] == 2)
                 cube[0][0][2] = 1;
             if (rq->wIndex.bytes[0] == 3)
-                cube[0][1][0] = 1;*/
+                cube[0][1][0] = 1;
 
             if      (rq->wIndex.bytes[0] == 0)
                     x = rq->wValue.bytes[0];
@@ -38,7 +39,7 @@ usbMsgLen_t usbFunctionSetup(uchar data[8])
                     z = rq->wValue.bytes[0];
 
             else if (rq->wIndex.bytes[0] == 3)
-                    cube[x][y][z] = rq->wValue.bytes[0];
+                    //cube[x][y][z] = rq->wValue.bytes[0];
 
         } else if ( rq->bRequest == CUSTOM_RQ_GET_STATUS ) {
             // Send one byte to the USB host.
@@ -48,7 +49,7 @@ usbMsgLen_t usbFunctionSetup(uchar data[8])
             //return 1;                       // tell the driver to send 1 byte
 
             //return 0;                       // tell the driver to send 0 byte
-
+*/
         }
     }else{
         /* class requests USBRQ_HID_GET_REPORT and USBRQ_HID_SET_REPORT are
@@ -69,7 +70,7 @@ void init_usb(void)
     usbDeviceDisconnect();  /* enforce re-enumeration, do this while interrupts are disabled! */
 
     i = 0;
-    while(--i){             /* fake USB disconnect for > 250 ms */
+    while(--i) {             /* fake USB disconnect for > 250 ms */
         //wdt_reset();
         _delay_ms(1);
         //sleep_nop(255);
diff --git a/firmware/usb.h b/firmware/usb.h
index f1e4c03..5db1cec 100644
--- a/firmware/usb.h
+++ b/firmware/usb.h
@@ -55,13 +55,14 @@ PROGMEM char usbHidReportDescriptor[22] = {    /* USB report descriptor */
 
 void init_usb(void);
 
-volatile uint8_t x;
+/*volatile uint8_t x;
 volatile uint8_t y;
-volatile uint8_t z;
+volatile uint8_t z;*/
 
 // usb buffer
 //extern uint8_t buffer[3][3][3];    // Framebuffer
-extern uint8_t cube[3][3][3];    // Framebuffer
+//extern uint8_t cube[3][3][3];    // Framebuffer
+extern uint32_t cube; // Framebuffer
 
 #endif // __usb_h__