Hey @wood I had a look at the video and you're absolutely right! The way the rules are written there should be two safe spots used, not one. I've marked that we'll need to go back and improve that video since I'm sure it's added some confusion. In the meantime though hopefully it's still a valuable activity that pushes students to keep developing their problem-solving skills. This lesson is aiming to highlight that storage is important both in familiar ways (like saving photos and documents) and perhaps less familiar ways (like temporary storage during an algorithm). Essentially I'm including all that to say that I hope you still make use of the activity while we work to improve some of the resources
As always the feedback is much appreciated!