Active Picture 1
Just click the green flag, wait a few seconds and watch the action.
Key technique: the use of background pieces as sprites and layering them to hide or reveal other sprites.
Discovered a helpful technique to do this: right click on Stage background and choose "grab screen background for sprite" then draw selection around area you want as sprite (works for version 1.4)
Several images are animated gifs that have been borrowed from various web locations. Deconstructed into individual frames with Microsoft Gif Animator and imported as sprite costumes.
See scripts for looping costumes to get animations.
XY positions need to be fairly carefully controlled.