Better, but a point keeps jumping graphics window
I have attached two files, which do the same thing. They are modeling the "Mad Tea Cup" ride at Disneyland. I want to show a point moving as the riders would and also have the option to Trace the point. I did this by defining Y and Y' the same way and when the Text "Show Traces" is selected, a script runs which sets Y' visible in Graphics. Y always shows but does not trace, Y' traces when it is set visible. Both Y and Y' have been declared in Graphics but not in Graphics2. However, whenever I open it, all is good except Y' appears on in Graphics2, is visible and Traces. Y remains in Graphics only. I cannot figure out why this happens.
I have a work around (the file ending in wa) that turns off Y' in Graphics2 when "Turn Animation On" or "Show Traces" is selected. So while this is not an immediate problem, it is one of those annoying irritants. If you look at the code, I have defined togTr=0 to start and the script has togTr=1-togTr so TogTr is either 0 or 1. Hence in the work around togTr==2 will always be false.