diff --git a/README.md b/README.md
index 7e21064..927fc29 100644
--- a/README.md
+++ b/README.md
@@ -1,8 +1,8 @@
 # sm-theme
 
-<a href="https://github.com/blyndusk/sm-theme/releases/latest"><img src="https://img.shields.io/github/release-pre/blyndusk/sm-theme.svg"/></a>
+<a href="https://github.com/blyndusk/sm-theme/releases/latest"><img src="https://img.shields.io/github/release/blyndusk/sm-theme.svg" alt="sm-theme last release"/></a>
 <img src="https://img.shields.io/github/languages/top/blyndusk/sm-theme.svg" alt="sm-theme top language"/>
-<a href="https://github.com/blyndusk/sm-theme/blob/master/LICENSE"><img src="https://img.shields.io/github/license/blyndusk/sm-theme.svg"/></a>
+<a href="https://github.com/blyndusk/sm-theme/blob/master/LICENSE" alt="sm license"><img src="https://img.shields.io/github/license/blyndusk/sm-theme.svg"/></a>
 
 ![sm-theme](./docs/sm-theme.png)
 
@@ -38,34 +38,38 @@
 #### Without smileys
 
 ```bash
-13    local with_smileys=0;
+13    local SM_WITH_SMILEYS=0;
 ```
 
-![with-smileys](./docs/without-smileys.png)
+![without-smileys-clean](./docs/without-smileys-clean.png)
+![without-smileys-dirty](./docs/without-smileys-dirty.png)
 
 #### With smileys
 
 ```bash
-13    local with_smileys=1;
+13    local SM_WITH_SMILEYS=1;
 ```
 
-![with-smileys](./docs/default.png)
+![with-smileys-clean](./docs/with-smileys-clean.png)
+![with-smileys-clean](./docs/with-smileys-dirty.png)
 
 ### 2. Lines
 
 #### With two lines
 
 ```bash
-16    local prompt_lines=2;
+16    local SM_PROMPT_LINES=2;
 ```
-![with-smileys](./docs/2-lines.png)
+
+![2 lines](./docs/2-lines.png)
 
 #### With three lines
 
 ```bash
-16    local prompt_lines=3;
+16    local SM_PROMPT_LINES=3;
 ```
-![with-smileys](./docs/default.png)
+
+![3 lines](./docs/with-smileys-dirty.png)
 
 ## Curated List
 
diff --git a/sm.zsh-theme b/sm.zsh-theme
index a490ee2..6ea03e3 100644
--- a/sm.zsh-theme
+++ b/sm.zsh-theme
@@ -10,10 +10,10 @@ echo -e "\e[31m
 # config
 
 # 1: with smileys ; 0: without smileys
-local with_smileys=1;
+local SM_WITH_SMILEYS=1;
 
 # 2: with 2 lines ; else: default
-local prompt_lines=3
+local SM_PROMPT_LINES=3;
 
 # write 
 #   $(pictos_or_smileys 1 <0/1>) to use emojis
@@ -21,8 +21,8 @@ local prompt_lines=3
 pictos_or_smileys () {
     local emojis;
     local emojis=(" ✘" "[ಠ_ಠ]" " ✔︎" "[･‿･]");
-    if [ "$1" -eq 0 ] ; then echo "%F{red}${emojis[1 + $with_smileys]}%F{default}" ;
-    elif [ "$1" -eq 1 ] ; then echo "%F{green}${emojis[3 + $with_smileys]}%F{default}" ; fi
+    if [ "$1" -eq 0 ] ; then echo "%F{red}${emojis[1 + $SM_WITH_SMILEYS]}%F{default}" ;
+    elif [ "$1" -eq 1 ] ; then echo "%F{green}${emojis[3 + $SM_WITH_SMILEYS]}%F{default}" ; fi
 }
 
 # display red user if sudo is enabeled
@@ -32,7 +32,7 @@ sudo_color() {
 }
 
 sm_prompt() {
-    if [ $prompt_lines -eq 2 ] ; then
+    if [ $SM_PROMPT_LINES -eq 2 ] ; then
         echo '$SM_PREFIX $SM_USER $SM_DIR $(git_prompt_info) $(git_prompt_status)
 $SM_SUFFIX' 
     else echo '$SM_PREFIX $SM_USER $(git_prompt_info) $(git_prompt_status)