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    1. Which block category instructs the sprite to play music?
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                              uiz    Bee       2. Which operator allows you to do arithmetic calculations?

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                      PEN BLOCKS

                      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. In
                      Scratch, you have to add Pen blocks to the block category. To do so, click on the Add Extension
                      button at the bottom left corner of the Code tab and select Pen option. The Pen blocks will be
                      added to the Code tab. 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.

                                 change pen size by  1      It modifies the thickness of the pen.

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

                                        erase all           It erases the pen marks from the stage.

                      Drawing Polygons

                      With  the  Repeat  block,  you  can  draw  Polygons.  Examples  of polygons  are triangle,  square,
                      pentagon, hexagon, heptagon, octagon, nonagon, decagon, etc.

                      To draw polygons in Scratch, you must remember three points:
                      1.   You must know the number of sides in the shape. This is the value to be given in repeat block.

                      2.  Each time a repeat command is used, you draw a line and turn at a corner.

                      3.   You must know the degree of the angle at the corner. It is very easy to calculate this. Just
                          divide 360 by the number of sides in the shape.

                       82   Premium Edition-VI

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