title: User Input in Google Spreadsheet Script
body: <p>I have a script now that creates a big matrix based on all kinds of variables. </p>
  
  <p>A few variables change periodically and their values are hard-coded so I need to update the script often. </p>
  
  <p>How can I prompt a dialog and ask the user for some info and then use said info for a few of my variables? I just want a dialog with a couple text boxes for user input and an OK button to continue the script.</p>