title: d3js Tree square
body: <p>I would like to use d3.js to build a pedigree tree. </p>
  
  <p>All exemples that I found are showcasing organic trees. </p>
  
  <p><img src="https://i.stack.imgur.com/uUlMr.png" alt="enter image description here"></p>
  
  <p>Are there any exemples out there with a pedigree like style ?</p>
  
  <p><img src="https://i.stack.imgur.com/qrCBH.png" alt="enter image description here"></p>