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    Operator                 Meaning                                  Examples

                                             Logical or                   when    clicked

                               or            The result is true, if one   if     100  > 50    or    100  > 200   then
                                             of the statements is           say 100 is either greater than 50 or 200
                                             true.

                                             Logical not
                                                                          when    clicked
                                             Reverses the condition,
                            not              i.e. it’s false if the       if     not    50  > 100   then
                                             condition is true and          say Reverses the condition

                                             vice-versa.

                               CREATING SHAPES

                     We have learnt how to control sprites. Now, let us learn about creating shapes in Scratch
                     using Pen 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 learn about 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.

                                                                                                     Blocks in Scratch  107

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