text: #!/usr/bin/node
  const Rectangle = require('../4-rectangle');
  
  const r1 = new Rectangle(2, 3);
  console.log('Normal:');
  r1.print();
  
  console.log('Double:');
  r1.double();
  r1.print();
  
  console.log('Rotate:');
  r1.rotate();
  r1.print();
  