diff --git a/module03/ex00/bitmanip.h b/module03/ex00/bitmanip.h
index 4df44d1..bf9c297 100644
--- a/module03/ex00/bitmanip.h
+++ b/module03/ex00/bitmanip.h
@@ -41,13 +41,19 @@
 #define D4 4
 #define SW1 2
 #define SW2 4
+#define D5B 3
+#define D5R 5
+#define D5G 6
 
 // Elements (port, bit)
-#define LED1	(B, D1)
-#define LED2	(B, D2)
-#define LED3	(B, D3)
-#define LED4	(B, D4)
-#define BUTTON1	(D, SW1)
-#define BUTTON2	(D, SW2)
+#define LED1		(B, D1)
+#define LED2		(B, D2)
+#define LED3		(B, D3)
+#define LED4		(B, D4)
+#define BUTTON1		(D, SW1)
+#define BUTTON2		(D, SW2)
+#define RGB5_BLUE	(D, D5B)
+#define RGB5_RED	(D, D5R)
+#define RGB5_GEEN	(D, D5G)
 
 #endif // BITMANIP_H
\ No newline at end of file
diff --git a/module03/ex00/interrupt.h b/module03/ex00/interrupt.h
index dccc1c5..9668ef7 100644
--- a/module03/ex00/interrupt.h
+++ b/module03/ex00/interrupt.h
@@ -2,7 +2,7 @@
 #define INTERRUPT_H
 
 // 7.3.1 : SREG – AVR Status Register
-#define ENABLE_GLOBAL_INTERRUPT		(1<<7)
-#define DISABLE_GLOBAL_INTERRUPT	(0<<7)
+#define ENABLE_GLOBAL_INTERRUPT		(1<<SREG_I)
+#define DISABLE_GLOBAL_INTERRUPT	(0<<SREG_I)
 
 #endif // INTERRUPT_H
\ No newline at end of file
diff --git a/module03/ex00/main.c b/module03/ex00/main.c
index 0eabb0d..c0ef051 100644
--- a/module03/ex00/main.c
+++ b/module03/ex00/main.c
@@ -1,20 +1,32 @@
 #include <avr/io.h>
 #include <util/delay.h>
-#include <avr/interrupt.h>		// https://www.nongnu.org/avr-libc/user-manual/group__avr__interrupts.html
+#include <avr/interrupt.h>
 
 #include "utils.h"
 #include "bitmanip.h"
-#include "timer.h"
-#include "usart.h"
-#include "interrupt.h"
 
 
-// ask for username and password
-int main() {
-	uart_init();
-	ask_for_username();
-
-	SREG |= ENABLE_GLOBAL_INTERRUPT;												// 7.3.1 : Status Register, bit 7 : I – Global Interrupt Enable
-
-	while(1);
+void rgb_d5_roll_colors() {
+	MODE_OUTPUT(RGB5_RED);
+	MODE_OUTPUT(RGB5_GEEN);
+	MODE_OUTPUT(RGB5_BLUE);
+	while(1) {
+		SET_ELEM(RGB5_RED);
+		_delay_ms(1000);
+		CLEAR_ELEM(RGB5_RED);
+		SET_ELEM(RGB5_GEEN);
+		_delay_ms(1000);
+		CLEAR_ELEM(RGB5_GEEN);
+		SET_ELEM(RGB5_BLUE);
+		_delay_ms(1000);
+		CLEAR_ELEM(RGB5_BLUE);
+	}
+}
+
+// led RGB D5 must turns on in red then green then blue in a loop
+int main() {
+
+	while(1) {
+		rgb_d5_roll_colors();
+	}
 }