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    CREATING SHAPES

                     We have learnt how to control sprites in the previous chapter. In this chapter, we will learn

                     about creating shapes. Thus, we can repeat the actions of a stack of blocks by making use
                     of the various blocks in the Control block category.

                     PEN BLOCK

                     Pen blocks provide a trail for the sprite and give instructions to change the colour, size
                     and shade of the trail. These blocks are colour-coded as dark green and used to draw
                     shapes in Scratch. We can add pen blocks by clicking on the Add Extension button, then

                     clicking on Pen extension to add it. Let us read pen blocks and their functions.

                                       Blocks                                            Functions

                             pen down                               It places the pen in the down position.

                             pen up                                 It disables  drawing operations  by  lifting  the
                                                                    pen.

                             set pen color to                       It specifies the colour to be used while drawing.

                             Change pen color          by 10        It modifies the colour of a line.

                                                                    It modifies the thickness of the pen. You can

                                                                    also change the thickness  by writing the
                             Change pen by  1
                                                                    desired number in the number box, number 1
                                                                    being the least thick.

                             stamp                                  It draws or stamps the image of a sprite onto
                                                                    the stage.

                             erase all                              It erases the pen marks from the stage.

                     Drawing a Line

                     To draw a line, follow the given steps:

                     Step  1    Drag a  when     clicked   block to the scripts area from the Events menu.

                                                                                             Drawing Shapes in Scratch  83

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