diff --git a/defines.h b/defines.h
index 0d3d15f..e9d7c1a 100644
--- a/defines.h
+++ b/defines.h
@@ -3,13 +3,15 @@
 #define STATUS_QUIT_PROGRAM 1
 #define STATUS_RUN_BACKEND 2
 #define STATUS_RELOAD_DIRECTORY 4
-#define STATUS_UPDATE_SCREEN_INTERACTION 8
+#define STATUS_UPDATE_SCREEN_GENERIC 8
 #define STATUS_UPDATE_SCREEN_RESIZE 16
-#define STATUS_UPDATE_SCREEN_PRINTED 32
-#define STATUS_UPDATE_SCREEN_MASK (STATUS_UPDATE_SCREEN_INTERACTION | STATUS_UPDATE_SCREEN_RESIZE | STATUS_UPDATE_SCREEN_PRINTED)
-#define STATUS_USER_ROOT 64
-#define STATUS_INPUT_MATCH 128
-#define STATUS_DELTA_TIME 256
+#define STATUS_UPDATE_SCREEN_CLEAR 32
+#define STATUS_UPDATE_SCREEN_DIR_CHANGE 64
+#define STATUS_UPDATE_SCREEN_MASK (STATUS_UPDATE_SCREEN_GENERIC | STATUS_UPDATE_SCREEN_RESIZE | STATUS_UPDATE_SCREEN_CLEAR | STATUS_UPDATE_SCREEN_DIR_CHANGE)
+#define STATUS_USER_ROOT 128
+#define STATUS_INPUT_MATCH 256
+#define STATUS_DELTA_TIME 512
+#define STATUS_MOVE_RIGHT_MATCH 1024
 
 #define SETTINGS_HAS_COLOR 1
 
@@ -71,9 +73,9 @@ typedef struct File {
 	char *file_name;
 } file;
 typedef struct Dir {
-	unsigned long file_count;
 	file *current_file;
 	file *file_list;
+	unsigned long file_count;
 } dir;
 typedef struct Color {
 	char *file_extension;
diff --git a/interactions.c b/interactions.c
index a6bcfa8..6729969 100644
--- a/interactions.c
+++ b/interactions.c
@@ -21,6 +21,7 @@ extern pthread_mutex_t mutex_rgt;
 extern pthread_mutex_t mutex_mid;
 extern pthread_mutex_t mutex_btm;
 extern pthread_cond_t cond_rgt;
+extern pthread_cond_t cond_mid;
 extern dir mid_dir;
 
 extern unsigned int terminal_height;
@@ -72,7 +73,7 @@ void user_interactions() {
 			memset(input, 0, INPUT_BUFFER_SIZE);
 			input_pass = 0;
 		}
-		status |= STATUS_UPDATE_SCREEN_INTERACTION;
+		status |= STATUS_UPDATE_SCREEN_GENERIC;
 	}
 
 
@@ -165,24 +166,28 @@ void quit_program(){
 	status = STATUS_QUIT_PROGRAM;
 }
 void update(){
-	status |= (STATUS_RUN_BACKEND | STATUS_UPDATE_SCREEN_MASK | STATUS_RELOAD_DIRECTORY | STATUS_UPDATE_SCREEN_MASK);
+	status |= (STATUS_RUN_BACKEND | STATUS_UPDATE_SCREEN_MASK | STATUS_RELOAD_DIRECTORY );
 }
 void select_all(){
 	TODO;
 }
 void move_down(unsigned long passes){
-	mid_dir.current_file = mid_dir.current_file + passes;
-	if (mid_dir.current_file >= mid_dir.file_list + mid_dir.file_count - 1) {
+	if (mid_dir.current_file + passes >= mid_dir.file_list + mid_dir.file_count - 1) {
 		mid_dir.current_file = mid_dir.file_list + mid_dir.file_count - 1;
+	} else {
+		mid_dir.current_file = mid_dir.current_file + passes;
 	}
-	status |= (STATUS_RUN_BACKEND | STATUS_UPDATE_SCREEN_INTERACTION);
+
+	status |= (STATUS_RUN_BACKEND | STATUS_UPDATE_SCREEN_GENERIC);
+		pthread_cond_signal(&cond_mid);
 }
 void move_up(unsigned long passes){
-	mid_dir.current_file = mid_dir.current_file - passes;
-	if (mid_dir.current_file <= mid_dir.file_list) {
+	if (mid_dir.current_file - passes <= mid_dir.file_list) {
 		mid_dir.current_file = mid_dir.file_list;
+	} else {
+		mid_dir.current_file = mid_dir.current_file - passes;
 	}
-	status |= (STATUS_RUN_BACKEND | STATUS_UPDATE_SCREEN_INTERACTION);
+	status |= (STATUS_RUN_BACKEND | STATUS_UPDATE_SCREEN_GENERIC);
 }
 void move_left(unsigned long passes){
 	unsigned long i;
@@ -190,14 +195,60 @@ void move_left(unsigned long passes){
 		if (chdir("..") != 0) {
 			/* TODO(2025-07-09T00:30:05) fix */
 			FAIL("move_left", "unhandled error of chdir");
-		} else {
-		}
+		}	
 	}
-	update();
+	status |= (STATUS_RUN_BACKEND | STATUS_RELOAD_DIRECTORY | STATUS_UPDATE_SCREEN_GENERIC | STATUS_UPDATE_SCREEN_DIR_CHANGE);
 
 }
 void move_right(){
-	TODO;
+
+	if (mid_dir.current_file->file_type & FILE_TYPE_DIR) {
+		if (chdir(mid_dir.current_file->file_name) != 0) {
+			/* TODO(2026-05-05T20:12:14) fix */
+			FAIL("move_right", "unhandled error of chdir");
+		}	
+	} else if (mid_dir.current_file->file_type & FILE_TYPE_EXEC) {
+	} else {
+		char *mime = get_mimetype(mid_dir.current_file);
+		char *extension = mid_dir.current_file->file_name;
+		char *cmd;
+		while (extension <= mid_dir.current_file->file_name + strlen(mid_dir.current_file->file_name)) {
+			if (*extension == '.') {
+				break;
+			}
+			extension++;
+		}
+
+		long i; 
+		if (extension <= mid_dir.current_file->file_name + strlen(mid_dir.current_file->file_name)) {
+			for (i = 0; i < file_extension_default_count; i++) {
+				if (strcmp(extension, file_extension_default_cmd[i].file_extension) == 0) {
+					cmd = parse_cmd(file_extension_default_cmd[i].command, mid_dir.current_file);
+					if (system(cmd)) {
+					}
+					status |= STATUS_MOVE_RIGHT_MATCH;
+					update();
+					break;
+				}
+			}
+		} 
+		if (!(status & STATUS_MOVE_RIGHT_MATCH)) {
+			for (i = 0; i < mimetype_default_count; i++) {
+				if (strstr(mimetype_default_cmd[i].mimetype, mime) == 0) {
+					cmd = parse_cmd(mimetype_default_cmd[i].command, mid_dir.current_file);
+					if (system(cmd)) {
+					}
+					update();
+					break;
+				}
+			}
+		}
+		status &= ~STATUS_MOVE_RIGHT_MATCH;
+		free(cmd);
+		free(mime);
+	}
+	status |= (STATUS_RUN_BACKEND | STATUS_RELOAD_DIRECTORY | STATUS_UPDATE_SCREEN_GENERIC | STATUS_UPDATE_SCREEN_DIR_CHANGE);
+
 }
 void toggle_hidden_files(){
 	file_modifiers ^= FILE_MODIFIERS_HIDDEN_FILES;
@@ -247,7 +298,7 @@ void order_by(unsigned long passes, int index){
 	seed = time(NULL);
 
 	order_func = key_binding[index].black_magic;
-	status |= (STATUS_RUN_BACKEND | STATUS_UPDATE_SCREEN_INTERACTION | STATUS_RELOAD_DIRECTORY);
+	status |= (STATUS_RUN_BACKEND | STATUS_UPDATE_SCREEN_GENERIC | STATUS_RELOAD_DIRECTORY);
 }
 void cmd_on_selected(unsigned long passes, int index){
 	TODO;