Old school gradient (before there was Photoshop)

Going through an old (and almost forgotten about) stack of papers, I found these drawings I did a long time ago.

Making drawings like this was my favorite pastime activity during highschool. Yes, I know, I wasn't supposed to be... hehe.

I remember using purple and pink ink to get the gradient going on.

The black and white one I've made on this huge piece of school testpaper.