Page 104 - trackpad v5.1 class 4 flipbook
P. 104

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.





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