Fix formatting constants being declared after first usage

This change doesn't affect functionality.
The only thing changed is the "failed to source pi-apps api script" error is now properly formatted.

pi-apps-terminal-bash-edition.sh

@@ -3,14 +3,31 @@
 ### ignore some shellcheck warnings
 # shellcheck disable=SC2145,SC2199,SC2068,SC2013,SC1090,SC2034
 
+#text formatting variables
+readonly red="\e[31m"
+readonly green="\e[32m"
+readonly yellow="\e[33m"
+readonly blue="\e[34m"
+readonly light_red="\e[91m"
+readonly light_green="\e[92m"
+readonly light_yellow="\e[93m"
+readonly light_blue="\e[94m"
+readonly cyan="\e[36m"
+readonly white="\e[97m"
+readonly dark_grey_background="\e[100m"
+readonly bold="\e[1m"
+readonly underline="\e[4m"
+readonly inverted="\e[7m"
+readonly normal="\e[0m"
+
 #directory variables
 if [[ -z "$DIRECTORY" ]]; then
 	DIRECTORY="$HOME/pi-apps"
 fi
 
 #check if "$DIRECTORY/api" exists
 if [[ ! -f "$DIRECTORY/api" ]]; then
-	echo -e "\e[1;31m[!] \e[0;31mThe pi-apps \"api\" script doesn't exist!\e[0m"
+	echo -e "${bold}${red}[!] \e[0;31mThe pi-apps \"api\" script doesn't exist!${normal}"
 	echo -e "Please report this here: https://github.com/Itai-Nelken/PiApps-terminal_bash-edition/issues/new"	
 	exit 1
 fi
@@ -23,23 +40,6 @@ fi
 #unset the error function from the api script, we wan't to use our own defined later
 unset error
 
-#text formatting variables
-readonly red="\e[31m"
-readonly green="\e[32m"
-readonly yellow="\e[33m"
-readonly blue="\e[34m"
-readonly light_red="\e[91m"
-readonly light_green="\e[92m"
-readonly light_yellow="\e[93m"
-readonly light_blue="\e[94m"
-readonly cyan="\e[36m"
-readonly white="\e[97m"
-readonly dark_grey_background="\e[100m"
-readonly bold="\e[1m"
-readonly underline="\e[4m"
-readonly inverted="\e[7m"
-readonly normal="\e[0m"
-
 function error() {
   echo -e "${red}${bold}[!]${normal} ${light_red}$1${normal}" 1>&2
   exit 1