Draw a rectangular space-filling curve of arbitrary size delay: 100 ms [link] ☝ 🦇 🖼️
diagonal direction: #0066ff orthogonal direction: #ff9900 background: #000000


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split to: ee-ee oo-oo
go top ⇒ down     go left ⇒ right     go to the longer side ✓
line: x 8   canvas: x 9   divide at >3/2 at ≥3/2
width: height: