Making Cartoons on Instagram: "The post shares a viral video of a drawing challenge requiring three colored interlocking loops (green, red, blue) to be sketched inside a square without lifting the pen or crossing lines, captioned "it's possible?" to hook viewers. - Labeled with a 99% failure rate, the puzzle tests spatial sequencing skills akin to graph theory's Eulerian paths, where success demands starting at a specific dot and precise color switches. - Achieving 5.2 million views and 391 repl