diff --git a/cd.sh b/cd.sh
index b64ce20..70add07 100644
--- a/cd.sh
+++ b/cd.sh
@@ -575,28 +575,12 @@ cd_write_python_module () {
     cd_write "${CD_PYTHON_PACKAGES}/env.py" "\
 $(cd_echo CD_OS_ID CD_OS_VERSION)
 
-STEP = ${CD_STEP}
 
+$(cd_echo CD_OPEN CD_SHUT)
 
-def open(*arguments):
-    print('${CD_OPEN}', end=str())
-    print(*arguments, flush=True)
+$(cd_echo CD_HORIZONTAL)
 
-
-def shut(*arguments):
-    print('${CD_SHUT}', end=str())
-    print(*arguments, flush=True)
-
-
-def split():
-    print('${CD_SPLIT}', flush=True)
-
-
-def step(*arguments):
-    STEP += 1
-    print('${CD_DOWN}')
-    print('${CD_BOX_VERTICAL}', STEP, *arguments)
-    print('${CD_UP}', flush=True)
+$(cd_echo CD_DOWN CD_SPLIT CD_UP)
 "
 }
 
@@ -615,11 +599,18 @@ ${CD_GIT_CHILD}
 
 # functions
 
+cd_box_open () {
+    echo "${CD_OPEN}${@}"
+}
+cd_box_shut () {
+    echo "${CD_SHUT}${@}"
+}
+
 cd_cat () {
     if [ -f "${1}" ] ; then
-        cd_open "${1}"
+        cd_box_open "${1}"
         cat "${1}" || exit
-        cd_shut "${1}"
+        cd_box_shut "${1}"
     fi
 }
 
@@ -669,9 +660,9 @@ local command="${1}"
 
 cd_ls () {
     if [ -d "${1}" ] ; then
-        cd_open "${1}"
+        cd_box_open "${1}"
         ls -a -l "${1}" || exit
-        cd_shut "${1}"
+        cd_box_shut "${1}"
     fi
 }
 
@@ -682,10 +673,6 @@ cd_mkdir () {
     fi
 }
 
-cd_open () {
-    echo "${CD_OPEN}${@}"
-}
-
 cd_openssl () {
 local file="${1}"
     if [ -f "${file}" ] ; then
@@ -715,10 +702,6 @@ shift
     fi
 }
 
-cd_shut () {
-    echo "${CD_SHUT}${@}"
-}
-
 cd_split () {
     echo "${CD_SPLIT}"
 }