updated bash scripts

scripts/mac-linux/start

@@ -1,5 +1,14 @@
 #!/usr/bin/env bash
 
-cd $( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
+C1='\033[1;37m'
+C2='\033[1;33m'
+NC='\033[0m'
+
+cd -- "$( dirname -- "${BASH_SOURCE[0]}" )"
 cd ../..
-npm start
+
+while true; do
+    npm start
+    printf "\n\n\n${C1}press ${C2}Control+C${C1} to close${NC}\n\n\n"
+    sleep 5
+done