diff --git a/herbstluftwm/autostart b/herbstluftwm/autostart
index 4c9da36..fa42fe8 100755
--- a/herbstluftwm/autostart
+++ b/herbstluftwm/autostart
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 # this is a simple config for herbstluftwm
 
@@ -18,13 +18,13 @@ Mod=Mod4     # Use the super key as the main modifier
 
 ######### MACHINE SPECIFIC SETUP #########
 ### Atlantis PC-specific setup ###
-if [[ $HOST == "atlantispc" ]]; then
+if [ $HOST=="atlantispc" ]; then
     hc detect_monitors
     /usr/bin/xrandr --output DVI-I-2 --right-of DVI-I-1
     xautolock -time 15 -locker /home/ik15ydit/.config/i3lock/piclock.sh &
 fi
 ### Atlantislaptop specific setup ###
-if [[ $HOST == "atlantislaptop" ]]; then
+if [ $HOST=="atlantislaptop" ]; then
     hc keybind XF86MonBrightnessUp spawn /bin/bash -c 'tee /sys/class/backlight/intel_backlight/brightness <<< "$(expr $(cat /sys/class/backlight/intel_backlight/brightness) + 5)"' 
     hc keybind XF86MonBrightnessDown spawn /bin/bash -c 'tee /sys/class/backlight/intel_backlight/brightness <<< "$(expr $(cat /sys/class/backlight/intel_backlight/brightness) - 5)"'
 fi
@@ -33,7 +33,7 @@ fi
 # keybindings
 #client handling
 hc keybind $Mod-Shift-q quit
-if [[ $HOST =~ atlantis* ]]; then
+if [ $HOST=~atlantis* ]; then
     hc keybind $Mod-Shift-p spawn /sbin/poweroff
 fi
 hc keybind $Mod-Shift-r reload
@@ -44,7 +44,7 @@ hc keybind $Mod-q close
 hc keybind $Mod-Return spawn urxvt 
 hc keybind $Mod-Shift-Return spawn xterm /bin/bash
 hc keybind $Mod-i spawn chromium 
-if [[ $HOST =~ atlantis* ]]; then
+if [ $HOST=~atlantis* ]; then
     hc keybind $Mod-l spawn i3lock -i ~/.config/i3lock/bg.png -t
 else
     hc keybind $Mod-l spawn xlock
diff --git a/zshrc b/zshrc
index 53a80f3..1e13d10 100644
--- a/zshrc
+++ b/zshrc
@@ -12,13 +12,15 @@ export LD_PRELOAD COLORED_STDERR_FDS
 
 ### PROMT ###
 MAIN_PROMT_COLOR="green"
+USER_COLOR="yellow"
 if [[ $USER == "root" ]]; then
+    USER_COLOR="red"
     MAIN_PROMT_COLOR="red"
 fi
 setopt promptsubst
-CMD_START=$'%F{MAIN_PROMT_COLOR}--->%f '
-PS1=$'%F{yellow}%m%f%F{red}:%f%F{cyan}%~%f\n'$CMD_START #promt
-PS1=%F{green}$'${(r:$COLUMNS::\u2500:)}'%f$PS1
+CMD_START=$'%F{$MAIN_PROMT_COLOR}--->%f '
+PS1=$'%F{$USER_COLOR}%m%f%F{red}:%f%F{cyan}%~%f\n'$CMD_START #promt
+PS1=%F{$MAIN_PROMT_COLOR}$'${(r:$COLUMNS::\u2500:)}'%f$PS1
 
 ### STYLE ###
 zstyle ':completion:*:default' list-prompt '%p'