Page 107 - trackpad v5.1 class 4 flipbook
P. 107

when  clicked
                     pen down
                     set pen size to 5
                 repeat 360                                                     The circle is the only shape with a
                  move 1   steps                                                        constant width.
                  turn   1  degrees
                      Change pen color  by  5







                                                                                                       PURE
                       In Scratch, each number is equal to 1 step  of the sprite on the stage. In the
                       turn block, change the degree from 15 to 90.                                    FACT



                 FOREVER BLOCK

                 Forever block is used to make the sprite do something infinitely (nonstop) until a command
                 is passed over it by the user. To use the Forever block, replace the repeat block with a forever

                 block. Create the following Script and Run to watch your Sprite go round and round!

                        when    clicked
                              pen down
                                                                        Subject: Deleting a block
                        forever
                           move 100      steps                         We can delete any block from the script
                                                                       by right-clicking on it and choosing the
                           turn     90  degrees                        Delete  Block  option  from the  context
                                                                       menu.




                 WAIT BLOCK

                 This block makes the script wait for the number of seconds specified by us, before the
                 next block follows. Sometimes, it is important to use the Wait block             wait  1  seconds
                 otherwise, the movements would occur so quickly that it would be

                 difficult to observe them.





                     Tick ( ) if you know this.

                     ▶   Forever block is used to make the sprite do something infinitely (nonstop) until a
                       command is passed over it by the user.

                     ▶  Pen down block places the pen in the down position.







                                                                                         Drawing Shapes in Scratch  105
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