Simple bash script menu

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http://www.unix.com – Dear Sir, May I know how do I go about adding the following feature into the script below: When user enter values other than 1,2,3,4, a) Message “Wrong entry !!! Pls select 1,2,3 or 4” is displayed b) The screen is cleared again and the menu is displayed. Code: #!/bin/bash clear var=1 until [ $var -eq 4 ] do echo "Menu" echo "(1) Item 1" echo "(2) Item 2" echo "(3) Item 3" echo "(4) Exit" read -p "Enter your choice " var clear echo "Your choice is $var" done I've tried adding * but it returns an syn (HowTos)