stage.ask example
Sprite.touching* no longer detect hidden Sprites
revert to simple sample with pens
making new dev. branch to keep master in good shape
formatting
Merge branch 'master' into dev
added motion trails to stage
Revert a6d9544..2df0924

This rolls back to commit a6d9544b3798f9496e9799d8d8cb752a98042092.
visual effects looking good
Merge branch 'dev'
change to test code