<https://s.mj.run/1zoZTmwe9I8> A blackboard standing on the ground, Floor-to-ceiling chalkboard,art by Jon Klassen, Sun light, Bright and lively, Light color, Picture book, hand drawn, simple, cartoon illustration, Leave the composition blank, Fresh style, Simple strokes, Flat illustration style, Children's picture book, minimalism, zoom layer, tachi-e, UHD, 8k, best quality --iw 0.5 --niji 6 --sref <https://s.mj.run/EiRbI8X49QY> --ar 4:3