How do I fix the syntax error 'do'?

Here is a program I am working with but this is the output.

echo "Please select your favorite color"
echo "         or 4 to exit"
echo "---------------------------------"

#set menu prompt
menu="select color : "

#set menu list
select menu in Blue Yellow Red Quit
do
       case $menu in
               Blue)
                        echo "----------------------------"
                        echo "Your favorite color is Blue!"
                        echo "----------------------------"
                        ;;
               Yellow)
                        echo "----------------------------"
                        echo "Your favorite color is Yellow!"
                        echo "----------------------------"
                        ;;
               Red)
                        echo "----------------------------"
                        echo "Your favorite color is Red!"
                        echo "----------------------------"
                        ;;
               Quit)
                        echo "----------------------------"
                        echo "Thank you!"
                        echo "----------------------------"
                        ;;           
               *)
                        echo -e "Error: please try again (select 1......4)!"
       esac

Please select your favorite color
         or 4 to exit
./select.sh: line 36: syntax error: unexpected end of file

how do I fix it? Background: I'm brand new to linux and coding so I barely have any understanding to what's going on. I'm 100% youtube university

Edit: #?4 Error: please try again (select 1....4)! –

echo "Please select your favorite color"
echo "         or 4 to exit"
echo "---------------------------------"

#set menu prompt
menu="select color : "

#set menu list
select menu in Blue Yellow Red Quit
do
       case $menu in
               Blue)
                        echo "----------------------------"
                        echo "Your favorite color is Blue!"
                        echo "----------------------------"
                        ;;
               Yellow)
                        echo "----------------------------"
                        echo "Your favorite color is Yellow!"
                        echo "----------------------------"
                        ;;
               Red)
                        echo "----------------------------"
                        echo "Your favorite color is Red!"
                        echo "----------------------------"
                        ;;
               Quit)
                        echo "----------------------------"
                        echo "Thank you!"
                        echo "----------------------------"
                        ;;           
               *)
                        echo -e "Error: please try again (select 1......4)!"
       esac
done

General example:

sudodus@bionic64 ~ $ select i in whoami "echo 'Hello World'" break;do $i;done
1) whoami
2) echo 'Hello World'
3) break
#? 1
sudodus
#? 2
'Hello World'
#? 3
sudodus@bionic64 ~ $

Example matching your question:

It is enough with a 'oneliner'.

$ select i in Blue Yellow Red Quit;do if [ "$i" == "Quit" ];then break;else echo "Your favorite color is $i";fi;done
1) Blue
2) Yellow
3) Red
4) Quit
#? 1
Your favorite color is Blue
#? 2
Your favorite color is Yellow
#? 3
Your favorite color is Red
#? 4
$ select i in Blue Yellow Red Quit;do if [ "$i" == "Quit" ];then break;else echo "Your favorite color is $i";fi;done
1) Blue
2) Yellow
3) Red
4) Quit
#? 4
$ 

Your script should be :

do
   case $menu in
       1) echo "----------------------------"
          echo "Your favorite color is Blue!"
          echo "----------------------------"
          ;;
       2) echo "----------------------------"
          echo "Your favorite color is Yellow!"
          echo "----------------------------"
          ;;
       3) echo "----------------------------"
          echo "Your favorite color is Red!"
          echo "----------------------------"
          ;;
       4) echo "----------------------------"
          echo "Thank you!"
          echo "----------------------------"
          exit
          ;;           
       *) echo -e "Error: please try again (select 1......4)!"
   esac
done