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if on edge, bounce   block makes the Sprite flip over if it touches the        3 left-right
               edge of the screen.                                                                 don‘t ratation
                                                                                                   all round
                 set rotation style left-right   block is used to set the  rotation  style

               of a sprite. The options to choose from are left-right, don't
               rotation and all round.
            Looks Blocks


            The blocks in purple colour are Looks blocks. They control how a
            Sprite appears on stage.
                 use the  say Hello! for 2  seconds  block to add a speech bubble to the

               Sprite for the given time in seconds.

                 say Hello!  block adds a speech bubble to the Sprite with the given text. The speech
               bubble will continue to appear until another speech or thought block is activated,
               or the stop button is pressed.

                 think Hmm... for 2  seconds   adds a thought bubble to the Sprite with the
               given text, for the given time in seconds.

                 think Hmm...  shows a thought bubble with the given text. The bubble
               will continue to appear until another speech or thought block is

               activated, or the stop button is pressed.

                 show   and   hide   shows and hides the Sprite on the stage.

                 change color  effect by 25   changes  the  Sprite  according
               to the selected effect. The seven effects are: color,
               fisheye, whirl, pixelate, mosaic, brightness  and

               ghost.

                 clear graphic effects  block will reset any graphical effects
               on the sprite. They will  be reset  to their default

               value zero.

            Sound Blocks

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

                 start sound Meow   block plays a sound without pausing
               the script. The sound options are “Meow” or recorded
               sound.




                                                                                 More Blocks in Scratch      63
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