diff --git a/examples/main.c (barrier) b/examples/main.c (barrier)
index 3e2a144a..2660f4c9 100644
--- a/examples/main.c (barrier)	
+++ b/examples/main.c (barrier)	
@@ -6,14 +6,12 @@ bar_t bar = BAR_INIT(2);
 void slave()
 {
 	bar_wait(&bar);
-
 	LED_Tick();
 }
 
 void master()
 {
 	tsk_delay(SEC);
-
 	bar_wait(&bar);
 }
 
diff --git a/examples/main.c (demo) b/examples/main.c (demo 1)
similarity index 74%
rename from examples/main.c (demo)
rename to examples/main.c (demo 1)
index 5a149e0b..9e31b643 100644
--- a/examples/main.c (demo)	
+++ b/examples/main.c (demo 1)	
@@ -28,10 +28,10 @@ int main()
     LED_Config();
     GRN_Config();
 	
-	tsk_start(TSK_CREATE(proc));
-	tsk_start(TSK_CREATE(proc));
-	tsk_start(TSK_CREATE(proc));
-	tsk_start(TSK_CREATE(proc));
-	tsk_start(TSK_CREATE(proc));
+	tsk_start((tsk_id)TSK_CREATE(proc));
+	tsk_start((tsk_id)TSK_CREATE(proc));
+	tsk_start((tsk_id)TSK_CREATE(proc));
+	tsk_start((tsk_id)TSK_CREATE(proc));
+	tsk_start((tsk_id)TSK_CREATE(proc));
 	tsk_stop();
 }
diff --git a/examples/main.c (demo 2) b/examples/main.c (demo 2)
new file mode 100644
index 00000000..0fb073c3
--- /dev/null
+++ b/examples/main.c (demo 2)	
@@ -0,0 +1,30 @@
+#include <stm32f4_discovery.h>
+#include <os.h>
+
+void proc(volatile unsigned *led, unsigned timePoint)
+{
+	for (;;)
+	{
+		tsk_sleepUntil(timePoint += SEC/2);
+		(*led)++;
+	}
+}
+
+OS_DEF(t1) { proc(&LED[0], SEC/8*0); }
+OS_DEF(t2) { proc(&LED[1], SEC/8*1); }
+OS_DEF(t3) { proc(&LED[2], SEC/8*2); }
+OS_DEF(t4) { proc(&LED[3], SEC/8*3); }
+OS_DEF(t5) { proc(&GRN,    SEC/8*4); }
+
+int main()
+{
+    LED_Config();
+    GRN_Config();
+	
+	tsk_start(t1);
+	tsk_start(t2);
+	tsk_start(t3);
+	tsk_start(t4);
+	tsk_start(t5);
+	tsk_stop();
+}
diff --git a/examples/main.c (flag) b/examples/main.c (flag)
index f3ae0c14..82fc8e4b 100644
--- a/examples/main.c (flag)	
+++ b/examples/main.c (flag)	
@@ -6,18 +6,14 @@ flg_t flg = FLG_INIT();
 void slave()
 {
 	flg_wait(&flg, 3, flgAll);
-
 	LED_Tick();
 }
 
 void master()
 {
 	tsk_delay(SEC/2);
-
 	flg_give(&flg, 1);
-
 	tsk_delay(SEC/2);
-
 	flg_give(&flg, 2);
 }
 
diff --git a/examples/main.c (infinite loop) b/examples/main.c (infinite loop)
index f65f96e1..339ba699 100644
--- a/examples/main.c (infinite loop)	
+++ b/examples/main.c (infinite loop)	
@@ -8,7 +8,6 @@ int main()
 	for (;;)
 	{
 		tsk_delay(SEC);
-
 		LED_Tick();
 	}
 }
diff --git a/examples/main.c (mailbox queue) b/examples/main.c (mailbox queue)
index abe1824d..c7a11710 100644
--- a/examples/main.c (mailbox queue)	
+++ b/examples/main.c (mailbox queue)	
@@ -10,7 +10,6 @@ void slave()
 	for (;;)
 	{
 		box_wait(&box, &x);
-
 		LEDs = x;
 	}
 }
@@ -22,9 +21,7 @@ void master()
 	for (;;)
 	{
 		tsk_delay(SEC);
-
 		x++;
-
 		box_give(&box, &x);
 	}
 }
diff --git a/examples/main.c (message queue) b/examples/main.c (message queue)
index 9eed5ffe..9ac22077 100644
--- a/examples/main.c (message queue)	
+++ b/examples/main.c (message queue)	
@@ -10,7 +10,6 @@ void slave()
 	for (;;)
 	{
 		msg_wait(&msg, &x);
-
 		LEDs = x;
 	}
 }
@@ -22,7 +21,6 @@ void master()
 	for (;;)
 	{
 		tsk_delay(SEC);
-
 		msg_give(&msg, ++x);
 	}
 }
diff --git a/examples/main.c (mutex) b/examples/main.c (mutex)
index 32f2d90b..5acd4203 100644
--- a/examples/main.c (mutex)	
+++ b/examples/main.c (mutex)	
@@ -6,18 +6,14 @@ mtx_t mtx = MTX_INIT();
 void slave()
 {
 	mtx_wait(&mtx);
-
 	LED_Tick();
-
 	mtx_give(&mtx);
 }
 
 void master()
 {
 	mtx_wait(&mtx);
-
 	tsk_delay(SEC);
-
 	mtx_give(&mtx);
 }
 
diff --git a/examples/main.c (semaphore) b/examples/main.c (semaphore)
index 234d98df..9aba1881 100644
--- a/examples/main.c (semaphore)	
+++ b/examples/main.c (semaphore)	
@@ -6,14 +6,12 @@ sem_t sem = SEM_INIT(0);
 void slave()
 {
 	sem_wait(&sem);
-
 	LED_Tick();
 }
 
 void master()
 {
 	tsk_delay(SEC);
-
 	sem_give(&sem);
 }
 
diff --git a/examples/main.c (signal 1) b/examples/main.c (signal 1)
index a02db027..0311098a 100644
--- a/examples/main.c (signal 1)	
+++ b/examples/main.c (signal 1)	
@@ -6,14 +6,12 @@ sig_t sig = SIG_INIT(sigClear);
 void slave()
 {
 	sig_wait(&sig);
-
 	LED_Tick();
 }
 
 void master()
 {
 	tsk_delay(SEC);
-
 	sig_give(&sig);
 }
 
diff --git a/examples/main.c (signal 2) b/examples/main.c (signal 2)
index fc6c1c45..450af22f 100644
--- a/examples/main.c (signal 2)	
+++ b/examples/main.c (signal 2)	
@@ -6,14 +6,12 @@ sig_id sig = SIG_CREATE(sigClear);
 void slave()
 {
 	sig_wait(sig);
-
 	LED_Tick();
 }
 
 void master()
 {
 	tsk_delay(SEC);
-
 	sig_give(sig);
 }
 
@@ -21,7 +19,7 @@ int main()
 {
 	LED_Config();
 
-	tsk_start(TSK_CREATE(slave));
-	tsk_start(TSK_CREATE(master));
+	tsk_start((tsk_id)TSK_CREATE(slave));
+	tsk_start((tsk_id)TSK_CREATE(master));
 	tsk_sleep();
 }
diff --git a/examples/main.c (timer 1) b/examples/main.c (timer 1)
index b1f08206..49144cbf 100644
--- a/examples/main.c (timer 1)	
+++ b/examples/main.c (timer 1)	
@@ -7,7 +7,6 @@ tmr_t tmr = TMR_INIT();
 void slave()
 {
 	sem_wait(&sem);
-
 	LED_Tick();
 }
 
diff --git a/examples/main.c (tsk_flip) b/examples/main.c (tsk_flip)
index a0506ab3..6ead33ce 100644
--- a/examples/main.c (tsk_flip)	
+++ b/examples/main.c (tsk_flip)	
@@ -7,7 +7,6 @@ void master(void);
 void slave()
 {
 	LED_Tick();
-
 	tsk_flip(master);
 }
 
@@ -16,7 +15,6 @@ void master()
 	static unsigned time = 0;
 
 	tsk_sleepUntil(time += SEC);
-
 	tsk_flip(slave);
 }
 
diff --git a/examples/main.c (tsk_startFrom) b/examples/main.c (tsk_startFrom)
index df3f64af..9c0c7d00 100644
--- a/examples/main.c (tsk_startFrom)	
+++ b/examples/main.c (tsk_startFrom)	
@@ -6,7 +6,6 @@ tsk_t tsk = TSK_INIT(0);
 void slave()
 {
 	LED_Tick();
-
 	tsk_stop();
 }
 
@@ -17,7 +16,6 @@ void master()
 	for (;;)
 	{
 		tsk_sleepUntil(time += SEC);
-
 		tsk_startFrom(&tsk, slave);
 	}
 }