>>6607571. Planning.
Probably had a pretty good idea of what he wanted in terms of design and color palette before he even turned computer on.
2. Draw the rest of the fucking owl.
Lots of layers. Lots of transparency.
Copy and paste, copy and paste, copy and paste. Delete 2px-4px vertical line segments so lower layers show through.
I'd give it a stab and record a video but I'm kinda artlet and I don't have gimp nor recording software. Maybe some other time.