title: p5.js // p5.vector.sub how it works and what it does exactly2
body: <p>I'm watching a new tutorial video of P5.js.</p>
  
  <p>I was following until I saw him calling a static function <code>P5.VECTOR.SUB(...)</code>.</p>
  
  <p>I couldn't understand what he is doing here, can someone explain please</p>
  
  <p>Thanks</p>
  
  <p><img src="https://i.stack.imgur.com/J86MG.png" alt="video tutorial screenshot"></p>