You've probably doodled with one of these in class: a blue Bic pen. But when Oscar Ukonu uses ... You can see that here. The single lines he's making are hatches, which create the base layer ...

They also stained my knickers blue for some reason. I really wanted to like these, but it's back to pads for me." Bic critic, daveyclayton offered: "I bought this pen (in error, evidently ...