How do I make a method for stopping?

http://www.cs.duke.edu/csed/alice09/...tsTutorial.pdf

I do not know how or where to download the world that goes along with this tutorial, so I am trying to create it from scratch. It's fine until I get to the mouse click events that tell me the red button should stop the bird. How do I make a method to make it stop moving?

[x2495iiii]

Depends on how the bird is moving.

If he's moving at speed, setting the speed value to zero will do the trick.

If his motion is dependent on a loop, making the red button set a value to true that stops the loop will also work.

You can post your world so we can take a look at it, if you want.