#! /bin/tcshecho "Select from the following menu:"cat << EOF   1) Red   2) Green   3) Blue   4) ExitEOFset choice = $<switch ("$choice")case 1:        echo Red is stop.        breakswcase 2:        echo Green is go\!        breakswcase 3:        echo Blue is a feeling...        breakswcase 4:        exit        breakswdefault:        echo Not a choice\!\!endswecho Good-bye