text: var doc = new jsPDF();
  
  // Empty square
  doc.rect(20, 20, 10, 10); 
  
  // Filled square
  doc.rect(40, 20, 10, 10, 'F');
  
  // Empty red square
  doc.setDrawColor(255,0,0);
  doc.rect(60, 20, 10, 10);
  
  // Filled square with red borders
  doc.setDrawColor(255,0,0);
  doc.rect(80, 20, 10, 10, 'FD'); 
  
  // Filled red square
  doc.setDrawColor(0);
  doc.setFillColor(255,0,0);
  doc.rect(100, 20, 10, 10, 'F'); 
  
   // Filled red square with black borders
  doc.setDrawColor(0);
  doc.setFillColor(255,0,0);
  doc.rect(120, 20, 10, 10, 'FD');
  
  // Black sqaure with rounded corners
  doc.setDrawColor(0);
  doc.setFillColor(255, 255, 255);
  doc.roundedRect(140, 20, 10, 10, 3, 3, 'FD'); 