diff --git a/src/generated.h b/src/generated.h
index 24d92e696..96f3a0d3a 100644
--- a/src/generated.h
+++ b/src/generated.h
@@ -15,9 +15,21 @@
 
 #include "globals.h"
 
-static const char* generated_source  = ""
-"LEDToggle (12);\n"
-"LEDToggle (13);\n"
-"LEDToggle (14);\n"
-"LEDToggle (15);\n"
-;
+static const char* generated_source = ""
+        "var tmp, a, b = 1, c = 2, d, e = 3, g = 4;\n"
+        "var count = 10000*10000;\n"
+        "for (var i = 0; i < count; i += 1)\n"
+        "{\n"
+        "  tmp = b * c;\n"
+        "  a = tmp + g;\n"
+        "  d = tmp * e;\n"
+        "\n"
+        "  if (i % 1000 == 0) \n"
+        "  { \n"
+        "    LEDToggle (12);\n"
+        "    LEDToggle (13);\n"
+        "    LEDToggle (14);\n"
+        "    LEDToggle (15);\n"
+        "  }\n"
+        "}\n"
+        ;
diff --git a/src/libcoreint/opcodes.c b/src/libcoreint/opcodes.c
index edc27460a..e60762bf4 100644
--- a/src/libcoreint/opcodes.c
+++ b/src/libcoreint/opcodes.c
@@ -410,6 +410,39 @@ opfunc_call_1 (OPCODE opdata __unused, struct __int_data *int_data)
 #endif
   
   if (!__strcmp ((const char*)str_value.str_p, "LEDToggle"))
+  {
+    ECMA_TRY_CATCH (cond_value, get_variable_value (int_data, opdata.data.call_1.arg1_lit_idx, false), ret_value);
+    JERRY_ASSERT(cond_value.value.value_type == ECMA_TYPE_NUMBER );
+    ecma_number_t * num_p = (ecma_number_t*)ecma_get_pointer(cond_value.value.value);
+    uint32_t int_num = (uint32_t)*num_p;
+    led_toggle (int_num);
+    ret_value = ecma_make_empty_completion_value ();
+    ECMA_FINALIZE (cond_value);
+  }
+  
+  if (!__strcmp ((const char*)str_value.str_p, "LEDOn"))
+  {
+    ECMA_TRY_CATCH (cond_value, get_variable_value (int_data, opdata.data.call_1.arg1_lit_idx, false), ret_value);
+    JERRY_ASSERT(cond_value.value.value_type == ECMA_TYPE_NUMBER );
+    ecma_number_t * num_p = (ecma_number_t*)ecma_get_pointer(cond_value.value.value);
+    uint32_t int_num = (uint32_t)*num_p;
+    led_on (int_num);
+    ret_value = ecma_make_empty_completion_value ();
+    ECMA_FINALIZE (cond_value);
+  }
+  
+  if (!__strcmp ((const char*)str_value.str_p, "LEDOff"))
+  {
+    ECMA_TRY_CATCH (cond_value, get_variable_value (int_data, opdata.data.call_1.arg1_lit_idx, false), ret_value);
+    JERRY_ASSERT(cond_value.value.value_type == ECMA_TYPE_NUMBER );
+    ecma_number_t * num_p = (ecma_number_t*)ecma_get_pointer(cond_value.value.value);
+    uint32_t int_num = (uint32_t)*num_p;
+    led_off (int_num);
+    ret_value = ecma_make_empty_completion_value ();
+    ECMA_FINALIZE (cond_value);
+  }
+  
+  if (!__strcmp ((const char*)str_value.str_p, "LEDOnce"))
   {
     ECMA_TRY_CATCH (cond_value, get_variable_value (int_data, opdata.data.call_1.arg1_lit_idx, false), ret_value);
     JERRY_ASSERT(cond_value.value.value_type == ECMA_TYPE_NUMBER );
@@ -419,6 +452,17 @@ opfunc_call_1 (OPCODE opdata __unused, struct __int_data *int_data)
     ret_value = ecma_make_empty_completion_value ();
     ECMA_FINALIZE (cond_value);
   }
+  
+  if (!__strcmp ((const char*)str_value.str_p, "wait"))
+  {
+    ECMA_TRY_CATCH (cond_value, get_variable_value (int_data, opdata.data.call_1.arg1_lit_idx, false), ret_value);
+    JERRY_ASSERT(cond_value.value.value_type == ECMA_TYPE_NUMBER );
+    ecma_number_t * num_p = (ecma_number_t*)ecma_get_pointer(cond_value.value.value);
+    uint32_t int_num = (uint32_t)*num_p;
+    wait_ms (int_num);
+    ret_value = ecma_make_empty_completion_value ();
+    ECMA_FINALIZE (cond_value);
+  }
 
   free_string_literal_copy (&str_value);
 
diff --git a/src/libperipherals/actuators.c b/src/libperipherals/actuators.c
index fcbb5af97..818a498d0 100644
--- a/src/libperipherals/actuators.c
+++ b/src/libperipherals/actuators.c
@@ -36,9 +36,9 @@ led_toggle (uint32_t led_id)
 
 
 #ifdef __TARGET_MCU
-  init_led (led_id);
+    init_led (led_id);
 
-  GPIOD->ODR ^= (uint16_t) (1 << led_id);
+    GPIOD->ODR ^= (uint16_t) (1 << led_id);
 #endif
 }
 
@@ -54,6 +54,7 @@ led_on (uint32_t led_id)
   init_led (led_id);
 
   GPIOD->BSRRH = (uint16_t) (1 << led_id);
+  GPIOD->BSRRL = (uint16_t) (1 << led_id);
 #endif
 }
 
@@ -67,6 +68,7 @@ led_off (uint32_t led_id)
 #ifdef __TARGET_MCU
   init_led (led_id);
 
+  GPIOD->BSRRL = (uint16_t) (1 << led_id);
   GPIOD->BSRRH = (uint16_t) (1 << led_id);
 #endif
 }
@@ -81,13 +83,11 @@ led_blink_once (uint32_t led_id)
 #ifdef __TARGET_MCU
   init_led (led_id);
 
-  uint32_t dot = 600000 * 3;
+  uint32_t dot = 300000;
 
   GPIOD->BSRRL = (uint16_t) (1 << led_id);
   wait_ms (dot);
-
   GPIOD->BSRRH = (uint16_t) (1 << led_id);
-  wait_ms (dot);
 #endif
 }