title: Oracle Apex: Create traffic lights in report based on condition
body: <p>I have an interactive report with a startdate, enddate and the difference between those days.</p>
  
  <p>Now I want to include a "traffic light" based on the <strong>difference between the days</strong>. 
  Thats means if the difference is negative I want a red light, is it greater than 0 I want a green light. </p>
  
  <p>Is there an easy way how to implement this ?
  Thanks!</p>