Changes

<prett>\define </tt> is like the TeX primitive <tt>\def</tt>: it defines a new TeX macro. Unlike <tt>\def</tt>, it will not allow you to redefine an already defined command.

to your command. text is the result when the macro gets expanded. <tt>\define </tt> isnot <tt>\long</tt>, that means you cannot use <tt>\par </tt> inside the arguments.