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simple variables, basic math, simple events, topdown controls, detect conditions, conditional loops, resize actor, variables, direction and turning, topdown basics, functions, expert math, advanced motion, actor properties, simple conditionals, lists, miscellaneous, simple loops, topdown automations, simple motion, advanced control, advanced animation, visibility, advanced math, advanced costume handling, advanced loops, expert physics, simple drawing, layers, delays, pen color, pen size, screen bounds, shape drawing, graphic effects, cloning, platformer controls, platformer basics, program control, string handling, stage property, simple messaging, simple sound playing, pen shade, advanced messaging, fill color, timer,