diff --git a/module01/ex00/main.c b/module01/ex00/main.c
index 75d17b0..3809963 100644
--- a/module01/ex00/main.c
+++ b/module01/ex00/main.c
@@ -34,13 +34,24 @@
 #define SW2 4
 
 #define PRESCALE_VALUE				1024
+#if (PRESCALE_VALUE == 1)
+	#define PRESCALE_SET (1 << CS10)
+#elif (PRESCALE_VALUE == 8)
+	#define PRESCALE_SET (1 << CS11)
+#elif (PRESCALE_VALUE == 64)
+	#define PRESCALE_SET (1 << CS10) | (1 << CS11)
+#elif (PRESCALE_VALUE == 256)
+	#define PRESCALE_SET (1 << CS12)
+#elif (PRESCALE_VALUE == 1024)
+	#define PRESCALE_SET (1 << CS10) | (1 << CS12)
+#endif
 #define TIME_MS(ms)					(((F_CPU / PRESCALE_VALUE) * ms) / 1000)
 
 int main() {
 	MODE_OUTPUT(B, D2);
 	TURN_OFF_LED(D2);
 
-	TCCR1B |= ((1 << CS10 ) | (1 << CS12 ) ); // set timer with prescale
+	TCCR1B |= (PRESCALE_SET); // set timer with prescale
 
 	while(1) {
 		if ( TCNT1 >= TIME_MS(500)) {