[Fluxus] every-frame-task/undefined identifier: gl error when running mndl.hu Hackpact Day 12

[Eric Wafford]

Hey there gang.. Was getting around to digging a bit deeper into
fluxus and was picking apart the wonderful examples there. I tried to
run the code found for Day 12, but get two errors:

Error in Task 'every-frame-task - Task removed.
reference to undefined identifier: gl

Code is the same as found on site.

Thanks for any help. I tried to google, but had no luck. Are there
changelogs available?