diff --git a/emul_inst_exec.c b/emul_inst_exec.c
index 7c8dafa..01f2203 100644
--- a/emul_inst_exec.c
+++ b/emul_inst_exec.c
@@ -2,6 +2,25 @@
 #include "emul_io_std.h"
 #include <string.h>
 
+// exit message
+static char faild_message();
+#define EXIT_MESSAGE_LENGTH 128
+void emul_inst_exec_get_faild_message(char *msg);
+// Private
+//void emul_inst_exec_set_faild_message();
+
+// propaty
+static RUNMODE RunMode;
+
+void emul_inst_exec_set_runmode(RUNMODE mode) {
+    RunMode = mode;
+}
+RUNMODE emul_inst_exec_get_runmode() {
+    return RunMode;
+}
+
+//
+
 int emul_inst_exec_load(char *filename) {
     return emul_inst_dec_load(filename);
 }
@@ -192,9 +211,9 @@
 
 /* Execute pseudocode
  * RETURN:
- *   seccsess: 1
+ *   succsess: 1
  *   failed  : 0 */
-int emul_inst_exec_pseudo(char token[LOAD_TOKEN_MAX]) {
+exitcode_t emul_inst_exec_pseudo(char token[LOAD_TOKEN_MAX]) {
     char label[LABEL_NAME_LENGTH_MAX];
     char temp[LOAD_TOKEN_MAX];
     // execute pseudocode.
@@ -205,7 +224,7 @@
 
     // 例外処理：疑似コードが見つからない
     if ( ps_id == PSEUDO_DECODE_ERROR ) {
-        return 0;
+        return Failed;
     }
 
     switch( ps_id ) {
@@ -235,10 +254,12 @@
             emul_reg_get(Spc)
         );
         break;
-    //case RUN:
-    //    break;
-    //case STEP:
-    //    break;
+    case RUN:
+        emul_inst_exec_set_runmode(Run);
+        break;
+    case STEP:
+        emul_inst_exec_set_runmode(Step);
+        break;
     //case INPUT:
     //    break;
     //case OUTPUT:
@@ -251,14 +272,14 @@
 	    emul_out_std_debug("[疑似コード]まだ実装してないので待って！\n");
     }
 
-    return 1;
+    return Success;
 }
 
 /* Execute Step
  * RETURN:
- *   seccsess: 1
+ *   succsess: 1
  *   failed  : 0 */
-int emul_inst_exec_step()
+exitcode_t emul_inst_exec_step()
 #define COUNT_OPERAND_MAX 3
 {
     char token[LOAD_TOKEN_MAX];
@@ -275,7 +296,7 @@
     if ( emul_inst_dec_get_token(token) == 0 ) {
         emul_out_std_err("Non exist next token\n");
         // 次のトークンが見つからない場合終了
-        return 0;
+        return Failed;
     }
     emul_out_std_debug("token: %s\n", token);
     // オペコードIDを取得
@@ -288,11 +309,10 @@
         // 例外処理：疑似コードが見つからない
         if ( ps_id == PSEUDO_DECODE_ERROR ) {
             emul_out_std_err("Non exist next pseudocode\n");
-            return 0;
+            return Failed;
         } else {
             // 疑似コードを実行
-            emul_inst_exec_pseudo(token);
-            return 1;
+            return emul_inst_exec_pseudo(token);
         }
     }
 
@@ -395,26 +415,27 @@
     }
     //emul_inst_dec_get_operand(token);
 
-    return 1;
+    return Success;
 }
 
 /* Execute Run All
  * RETURN:
- *   seccsess: 1
+ *   succsess: 1
  *   failed  : 0 */
-int emul_inst_exec_run() {
+exitcode_t emul_inst_exec_run() {
     // step関数を終わるまで呼び出せばよい
     int exit_code;
-    while ( (exit_code = emul_inst_exec_step()) );
+    while ( (exit_code = emul_inst_exec_step()) == Success ) {
+        if (RunMode == Step) {
+            puts("...Wait for step, please input key enter.");
+            getchar();
+        }
+    }
     return exit_code;
 }
 
 int main(void) {
     emul_inst_exec_load("test_asm/test.asm");
     emul_reg_init();
-    while ( emul_inst_exec_step() ) {
-        puts("...Wait for step, please input key enter.");
-        getchar();
-    }
-    //emul_inst_exec_run();
+    emul_inst_exec_run();
 }
diff --git a/emul_inst_exec.h b/emul_inst_exec.h
index 45470cb..3cc4428 100644
--- a/emul_inst_exec.h
+++ b/emul_inst_exec.h
@@ -7,6 +7,21 @@
 #include "emul_mem.h"
 #include "emul_label.h"
 
+// Exit code
+typedef enum {
+  Failed,
+  Success,
+  Stop
+} exitcode_t;
+
+// ランモード
+typedef enum {
+  Run,
+  Step
+} RUNMODE;
+
+void emul_inst_exec_set_runmode(RUNMODE mode);
+RUNMODE emul_inst_exec_get_runmode();
 
 int emul_inst_exec_load(char *filename);
 
@@ -14,12 +29,12 @@
  * RETURN:
  *   seccsess: 1
  *   failed  : 0 */
-int emul_inst_exec_step();
+exitcode_t emul_inst_exec_step();
 
 /* Execute Run All
  * RETURN:
  *   seccsess: 1
  *   failed  : 0 */
-int emul_inst_exec_run();
+exitcode_t emul_inst_exec_run();
 
 #endif
diff --git a/test_asm/for-0-10.asm b/test_asm/for-0-10.asm
new file mode 100644
index 0000000..8ac6197
--- /dev/null
+++ b/test_asm/for-0-10.asm
@@ -0,0 +1,18 @@
+:DUMP DEBUG1
+addi $s0 $zero 0
+:REGCAT $s0
+
+:DUMP DEBUG0
+
+:LABEL LOOP
+addi $s0 $s0 1
+:REGCAT $s0
+slti $t0 $s0 10
+bne $t0 $zero LOOP
+
+addi $s0 $zero 0
+:LABEL LOOP1
+addi $s0 $s0 1
+:REGCAT $s0
+slti $t0 $s0 10
+bne $t0 $zero LOOP1
diff --git a/test_asm/test.asm b/test_asm/test.asm
index 8ac6197..eebc433 100644
--- a/test_asm/test.asm
+++ b/test_asm/test.asm
@@ -1,8 +1,9 @@
-:DUMP DEBUG1
+:DUMP DEBUG0
+:RUN
 addi $s0 $zero 0
 :REGCAT $s0
 
-:DUMP DEBUG0
+:STEP
 
 :LABEL LOOP
 addi $s0 $s0 1
@@ -10,6 +11,7 @@
 slti $t0 $s0 10
 bne $t0 $zero LOOP
 
+:RUN
 addi $s0 $zero 0
 :LABEL LOOP1
 addi $s0 $s0 1