3.2 demonstration

[jdonwells]

This year I am adding an additional slide to 3.2 to include an example program. https://snap.berkeley.edu/snap/snap.html#present:Username=jdonwells&ProjectName=Lab%202.2%20Yellow%20Brick%20Road%20generalized%20with%20conditionals
It is a rewrite of the Yellow Brick road lab but with loops and conditionals. Something they can relate to.

I have also added generalization so that the stage size can be changed and the program still works. We talk about generalization in 3.1 without really showing them how it would work in Snap!.