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    PEN BLOCK

                     The Pen blocks are green in colour. These blocks draw a trail as the sprite moves on
                     the stage. You can change the colour of the pen. In Scratch 3, you have to add Pen
                     blocks to the block category. To do so, follow the given steps:

                                                                       2  Click on Pen option.

                               1  Click on the
                               Add Extension
                                   button.

                     The Pen blocks are added to the Code tab.

                     Now let us learn about some of the Pen blocks and what they are used for.

                            erase all  block erases everything drawn by the pen.

                            stamp  block creates a duplicate of the current sprite. To see the image, click on
                       the sprite and drag.

                            pen up  block puts the pen up and stops the sprite from drawing
                       anything.

                        The sprite draws a non-stop line wherever it moves using                  pen down .

                            set pen color to   block sets the colour of the pen to a colour of your
                       choice from the drop-down menu.

                            Change pen color  by 10  block changes the pen colour, saturation,
                       brightness  and transparency.  Click  on the first text  box to  select
                       and change the pen effects. Click on the second

                       text box to give a value by which the effect will
                       change.

                            set pen color  to  50  block will set the pen colour,
                       saturation,  brightness  and  transparency to  the

                       given value.
                     To view the line in full screen, click on Full Screen

                     Control button          on the top right corner of the stage.

                                                                                     Introduction to Scratch Programming  85

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