I think I can help here. The tricky thing here is the way the
if block is used. Because it’s connected under
when run it will only check for edges exactly once when the program starts. These blocks should be moved to somewhere where they can be checked repeatedly, such as under an event or inside a behavior. Because your A sprite is “wandering”, you could add the code to check for edges inside the definition for wandering. This way it will repeatedly check for edges (and respond appropriately) as it wanders.
I hope this helps!
Mike, Curriculum Development Manager