Fun warmup! After struggling at first and going at it for an hour , I want to share what helped me: The part that i struggled with the most is putting different pressure throught the circle, so i started by only practicing making mushrooms with full pressure circles. Only after being comfortable with that - I started adding the pressure play. Another thing i noticed is i tried to sketch very quickly like Stan, when i started making the circles slower and brighter first, and only then adding the parts with higher pressure, it was much easier!