This is an interactive course to learn programming in a stripped down to the basics programming language with built in graphics commands. tiki.li is a test variant of easylang.online with a 2D coordinate system with bottom-left origin. I hope to gain insights on what is easier for beginners to understand. Some arguments for "bottom-left": the y-value corresponds to the height, in school it is taught that way. Some for "top-left": this is common in 2D computer graphics, it is easier to deal with a grid of rows and columns.
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[ 1.3 ms ] story [ 14.5 ms ] threadThe same course with "top-left origin": https://easylang.online/apps/tut_learn.html