Millisecond Forums

Hi, 
I'm very very new to inquisit and am modifying the attentional blink task script provided on millisecond. I have pretty much everything working except I can't figure out how to assign a new word item from a list to a value that will change with each trial. I have attached my script below as there are many places in the script that I have edited to try and make this work. 
The value I can't figure out is "selected_word" and I want the word that will be defined by this value to be randomly pulled from the list called "randomWords". Right now it appears that the way I am trying to define the value is causing just the expression to show up instead of it functioning properly and pulling a word from the list. Would greatly appreciate any help you can provide!!