Now make the Bearstack switch costumes as it moves.
Click the Costumes tab to see the different costumes.

Click the Scripts tab.
Click to the Looks category and drag out a switch costume block.
Choose a costume from the pull-down menu.
Add a when this key pressed block on top and build this script:

Tip: Choose the same key as in the first step so the Bearstack switches costumes as it moves.
Now press the key to try it.
Next, animate the walk