Re: How do you do that?

plan A: start with a vague idea, make a rough sketch, revise the
sketch until it looks good, stop.

plan B: start with a vision, figure out how to make it happen, make it
happen, revise your vision to fit the result, stop.

plan C: start with a random doodle, play with it until it looks like
something, combine it with other random doodles, stop.

plan D: start with someone else's sig, tweak it until it looks
different, put your name on it, stop.

plan E: start with one of these plans, switch to another plan when you
get stuck, ask for help when you run out of plans, stop.

plan F: take a drawing class, learn the limitations of the medium,
apply your training, stop.

plan G: study AI and art, write a program to generate random sigs, use
a neural net to filter out the bad ones, choose the one you like the
best, stop.

plan H: try something, throw it away, try again, throw that away,
repeat until tired, stop.

for specific advice, ask a specific question.
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