So I am a newbie obviously but I need some help.

I am trying to run a script to check that the number of fields in a database is equal to 4, if not they should try again and run an appropriate database file. The fields are separated by a semi colon. I've tried a lot of things, this what I'm trying to fix

awk -F':' { if (NF != 4){

zenity --info --text "The file pathname \"$2\" is not a four field colon separated database file.\n\nClick OK to exit, and re-run this program."
}
} \"$2\"