Scratch Tutorial: Interaction

Scratch Tutorial: Interaction RGS ICT

Scratch allows multiple sprites to give each other clues, in case another sprite “forgot his lines” in a play. • The clues are communicated between the sprites and Scratch calls it “broadcast”. • Another sprite will do something in response:

Sprites interact through clues BroadcastReceive Sprite 1 Sprite 2

Add a second sprite to interact with the cat, then double-click on the cat.

Assemble these blocks together

Dbl-click on the “broadcast” and make it say “Finish A”

Then Dbl-click on the second sprite (a girl in this case) and put these blocks in:

How did I make the girl look left (the original sprite looked right)Costumesedit

Flip horizontally and click “OK”

Extension activities • Dbl-click on the cat again and make another block for his scripts by right clicking on the first block and choosing to duplicate it, click again to place the blocks • Then modify the duplicate thus

You should have something like this:

Dbl-click on the girl and add another block the same way…

Try other messages back and forth… • Try to make the girl say “jump 5 times” and the cat would jump 5 times… • Etc. • End of tutorial

Scratch Tutorial: Interaction