Strange behavior

[shrdlu68]

Hi, I have a very strange situation where: I can't make any persistent changes from within the execute method. Any changes to global variables or instance variables made from within the execute method cannot be seen outside it. Here is a small program that demonstrates this: https://gist.github.com/shrdlu68/344d972f4ff5e88b956c2ab44693de04

What am I doing wrong? Thanks for your time.