FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -The Pen extension adds blocks so that sprites can draw on the stage as they move. Read how you can use these blocks to draw patterns here.

Detailed explanation-2: -In Scratch, every sprite has a hidden pen and the ability to live marks on the stage when it moves., which is located in the bottom left corner of the screen, and selecting the extension Pen.

Detailed explanation-3: -To use the Pen blocks in Scratch, you need add the Pen extension. Click on the Add extension button in the bottom left-hand corner. Click on the Pen extension to add it. The Pen section then appears at the bottom of the blocks menu.