Spawns blocks move outward, no rotation yet, no collision yet.

really alpha build that doesn't work yet
correct now! uses contrapositive with shortcircuit!

compare against changes in last commit to see minor change that works
now! the power of contrapositive and short circuiting logic is magical!
correct rotation with scroll wheel now! woo!

try running and scrolling wheel around, watch a single block wizz in
circles! woo!