Journey through blackpenredpen's most significant moments, from humble beginnings to major achievements.
blackpenredpen started the YouTube journey
Subscriber community reached 1K members
Subscriber community reached 10K members
Subscriber community reached 50K members
Subscriber community reached 100K members
Subscriber community reached 500K members
Subscriber community reached 1M members
I’m sorry, I have been saying “let x=1” wrong for ...
