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A knot diagram is one closed cord with a specified over/under choice at each crossing. Move vertices to reshape the route. Choose Switch a crossing, then tap an intersection to reverse which strand passes on top. Check diagram reports whether over and under alternate as you travel the cord. Make an alternating diagram with at least three crossings. Alternate route gives an example assignment; toggle a crossing and repair it yourself. This is diagram creation, not a physical knot-tying simulation or an unknot detector.
Original GPT-generated materials are bundled locally and used on the work surface. Source mechanism: https://github.com/jonobr1/two.js · MIT. An independent static adaptation; all editable program code and source notices are included.