Relates to Block 1 Part 2, Activity 18.
Briefly entranced by being able to turn the Command Prompt window different colours (note the UK spelling ...). Never knew you could do this. OK, it's probably not the most useful function, but hey.
There's red on light red:
Purple on white (apparently, though that doesn't look very white to me, but maybe it's my eyes):
And black on light yellow:
Probably should stop this now and get back to some actual studying.