1. Open your command-line application and navigate to your workspace.
2. Create a new folder named 06-06-redefine-read-only-props.
3. Copy or create an index.html that loads and runs a main function from main.js.
4. Create a main.js file with a main function that creates an object. Define a configurable, non-writable property named prop1 with a random value:

export function main() { 
  const obj = {}; 
 
  Object.defineProperty(obj, 'prop1',{ 
    writable: false, 
    configurable: true, 
    value: Math.random() 
  }); 
  console.log(obj.prop1) 
} 

5. Redefine that property as another random value and change configurable to false:

export function main() { 
  // ... 
 Object.defineProperty(obj, 'prop1',{
    writable: false,
    configurable: false,
    value: Math.random()
  });
  console.log(obj.prop1)}

6. Attempt to redefine the property a third time:

 export function main() { 
  // ... 
  // throws error
  Object.defineProperty(obj, 'prop1',{
    value: Math.random()
  }); 
} 

7. Start your Python web server and open the following link in your browser:
   http://localhost:8000/.
8. You should see the following output displayed: