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    Blocks                                          Functions

                                 say Hello!               This block displays a speech bubble of the Sprite.

                                                          This block gives the Sprite a thought bubble with the
                       think Hmm...    for 2  seconds
                                                          desired text which stays for a specified number of
                                                          seconds.

                               think Hmm...               This block gives the Sprite a thought bubble with the
                                                          desired text.

                        switch costume to   costume2      This block changes the appearance of the Sprite by
                                                          switching its costume.

                                next costume              This block changes the costume of the Sprite to the
                                                          next costume in the costume list.

                              change size by  10          This  block changes  the  size  of the  Sprite by  the
                                                          desired proportion.

                             set size by  100 %           This block sets the size of the Sprite to a specified
                                                          percentage of the original size.

                         change color   effect by 25      This block changes the visual effect applied to the
                                                          Sprite by the specified amount.

                          set   color  effect to 0        This block sets the visual effect to a specified number.

                               show   /   hide            The show block shows the hidden Sprite.

                                                          The hide block hides the current Sprite.

                     Sound Blocks

                     Sound blocks are in pink colour. They control sound functions. We can add music to
                     our Scratch project by using Sound blocks. You can even record your voice and save it.

                                  Blocks                                          Functions

                       play sound Meow      until done  This block plays a sound until the complete sound has
                                                        been played.

                            start sound Meow            This block starts playing a sound.

                               stop all sounds          This block stops all the sounds.

                             clear sound effects        This block clears all the sound effects.

                                                                                               Blocks in Scratch   71

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