diff --git a/exp3/Core/Src/main.c b/exp3/Core/Src/main.c
index 5c0102a..1fae0ee 100644
--- a/exp3/Core/Src/main.c
+++ b/exp3/Core/Src/main.c
@@ -65,6 +65,7 @@ uint16_t display_tab[] = {
   0x71
 };
 uint16_t PosSel = 0;
+uint8_t bias = 0;
 /* USER CODE END PV */
 
 /* Private function prototypes -----------------------------------------------*/
@@ -123,11 +124,16 @@ int main(void)
     if (sSysTickTimer.bTimeOk) {
       sSysTickTimer.bTimeOk = 0;
       HAL_GPIO_TogglePin(LED_GPIO_Port, LED_Pin);
+
+      if (++bias >= 8) {
+        bias = 0;
+      }
+
     }
     // if (sSysTickTimer.bTenMilSecOk) {
       SegLedData_GPIO_Port->ODR = 0x00;
       AddrA_GPIO_Port->ODR = PosSel;
-      SegLedData_GPIO_Port->ODR = display_tab[PosSel % 8];
+      SegLedData_GPIO_Port->ODR = display_tab[(PosSel + bias) % 8];
       if (++PosSel >= 8) {
         PosSel = 0;
       }