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.<p>The same course with "top-left origin": <a href="https://easylang.online/apps/tut_learn.html" rel="nofollow">https://easylang.online/apps/tut_learn.html</a>