Page 91 - TP_Plus_v4_Class3
P. 91

BLOCKS


                 Blocks are the codes or commands used to create a program in Scratch. It looks like a puzzle
                 piece and each block connects with the other block to perform a task.

                 Motion Block


                 The blocks that are used to control the movement of a sprite are known as Motion blocks.
                 They are blue in colour. For example, the motion block is used to move a sprite.

                 Here by default, 10 is the number of steps that the sprite will move forward. You can change

                 the number of steps  move 10  steps . To make the sprite move backward, give a minus (–) sign before
                 the number as shown below        move -30  steps  . This will move the sprite 30 steps back on the stage.

                 Looks Block


                 The blocks that are used to add speech and thought bubbles to the sprite are called Looks
                 Block. They are purple in colour.

                 For example, you want to add a speech bubble to the sprite for 2 seconds with a message
                 ‘Hello!’ as shown  say Hello!  for 2  seconds .

                 You can change the  message by  clicking  on the  message text box  and  typing  your own
                 message. You can also change the time by clicking on the time text box.  think Hmm...      for 2  seconds

                 Events Block


                 This is the topmost block means it is placed at the top of the script. It helps
                 to run the script on the stage as it controls the starting of scripts. It gives you    when     clicked
                 the control of all the blocks as without an event block no program will run.

                 To run the script, you have to click on the Go button before the other blocks.


                      ADDING A SPRITE


                 When you open Scratch, the default Sprite1 is the cat. The location of the sprite cat is at the
                 centre of the stage. Let us add another sprite to the stage.

                 To add a sprite, follow the given steps:






                                                                                                Click on a sprite
                                                                                                to add it to your   2
                                                                                                project.


                         Click on the Choose
                     1
                         a Sprite option.


                                                                                                 #Let’s Learn Scratch  89
   86   87   88   89   90   91   92   93   94   95   96