script

Syntax

[the] script of <object>

set the script of project "Worksheet" to "on openCard" & newline & "set the title of the owner of the target to" && \
    "short name of the owner of the target & colon & the short name of the target" & newline & "end openCard"

Explanation

The script property holds the object’s script, i.e. the program associated with it that reacts to things happening to the object.