diff --git a/buzzer.c b/buzzer.c
new file mode 100644
index 0000000..4590e2a
--- /dev/null
+++ b/buzzer.c
@@ -0,0 +1,26 @@
+#include<stdio.h>
+#include "Driver\DrvSYS.h"
+#include "Driver\DrvGPIO.h"
+#include "NUC1xx.h"
+
+void EINT1Callback(void){
+    DrvGPIO_ClrBit(E_GPB, 11);
+    DrvSYS_Delay(100000);
+    DrvGPIO_SetBit(E_GPB, 11);
+
+}
+int main(void){
+    UNLOCKREG();
+    DrvSYS_SetOscCtrl(E_SYS_XTL12M, 1);
+    DrvSYS_SelectHCLKSource(0);
+    LOCKREG();
+
+    DrvGPIO_Open(E_GPB, 11, E_IO_OUTPUT);
+    DrvGPIO_SetBit(E_GPB, 11);
+    DrvGPIO_SetBit(E_GPA, 12);
+    DrvGPIO_Open(E_GPB,15,E_IO_INPUT);
+    DrvGPIO_EnableEINT1(E_IO_FALLING, E_MODE_EDGE, EINT1Callback);
+    while(1){
+
+    }
+}
diff --git a/lcd_display.c b/lcd_display.c
new file mode 100644
index 0000000..295d51e
--- /dev/null
+++ b/lcd_display.c
@@ -0,0 +1,19 @@
+#include<stdio.h>
+#include "NUC1xx.h"
+#include "Driver\DrvGPIO.h"
+#include "Driver\DrvSYS.h"
+#include "NUC1xx-LB_002\LCD_Driver.h"
+
+int main(void){
+    UNLOCKREG();
+    DrvSYS_Open(48000000);
+    LOCKREG();
+
+    Initial_panel();
+    clr_all_panel();
+
+    print_lcd(0, "asuka");
+    print_lcd(1, "langley");
+    print_lcd(2, "soryuu");
+    print_lcd(3, "dagoat")
+}
diff --git a/rgb_led.c b/rgb_led.c
new file mode 100644
index 0000000..589baf2
--- /dev/null
+++ b/rgb_led.c
@@ -0,0 +1,42 @@
+#include<stdio.h>
+#include "NUC1xx.h"
+#include "Driver\DrvGPIO.h"
+#include "Driver\DrvUART.h"
+#include "Driver\DrvSYS.h"
+
+void InitLED(){
+    DrvGPIO_Open(E_GPA, 12, E_IO_OUTPUT);
+    DrvGPIO_Open(E_GPA, 13, E_IO_OUTPUT);
+    DrvGPIO_Open(E_GPA, 14, E_IO_OUTPUT);
+    DrvGPIO_SetBit(E_GPA, 12);
+    DrvGPIO_SetBit(E_GPA, 13);
+    DrvGPIO_SetBit(E_GPA, 14);
+}
+int main(void){
+    UNLOCKREG();
+    DrvSYS_Open(48000000);
+    LOCKREG();
+    InitLED();
+    while(1){
+        DrvGPIO_ClrBit(E_GPA, 12); 
+        DrvGPIO_SetBit(E_GPA, 13);
+        DrvGPIO_SetBit(E_GPA, 14);
+        DrvSYS_Delay(10000000);
+
+        DrvGPIO_SetBit(E_GPA, 12); 
+        DrvGPIO_ClrBit(E_GPA, 13);
+        DrvGPIO_SetBit(E_GPA, 14);
+        DrvSYS_Delay(10000000);
+
+        DrvGPIO_SetBit(E_GPA, 12); 
+        DrvGPIO_SetBit(E_GPA, 13);
+        DrvGPIO_ClrBit(E_GPA, 14);
+        DrvSYS_Delay(10000000);
+
+        DrvGPIO_SetBit(E_GPA, 12); 
+        DrvGPIO_SetBit(E_GPA, 13);
+        DrvGPIO_SetBit(E_GPA, 14);
+        DrvSYS_Delay(10000000);
+
+    }
+}
diff --git a/switchCase.asm b/switchCase.asm
index 9eabe59..17fce00 100644
--- a/switchCase.asm
+++ b/switchCase.asm
@@ -23,6 +23,7 @@ default_case
 Dest0 
     LDR R0, =10
     stop1
+
         B stop1
 Dest1 
     LDR R0, =20