Build Your Own Clock.
simple events, platformer controls, platformer basics, topdown basics, direction and turning, detect conditions, functions, layers, advanced motion, conditional wait, advanced math, visibility, advanced events, advanced physics, level design, simple loops, basic math, simple conditionals, expert physics, advanced costume handling, simple motion, screen bounds, delays, simple costume handling, platformer automations, topdown controls, topdown automations, miscellaneous,