Build Your Own Clock.
simple events, advanced physics, platformer basics, variables, advanced costume handling, platformer automations, platformer controls, actor properties, expert physics, detect conditions, advanced animation, topdown automations, advanced events, touching actor, functions, layers, text handling, advanced messaging, level design, simple loops, input/output, direction and turning, simple conditionals, miscellaneous, simple messaging, simple variables, music and instruments, simple sound playing, screen bounds, delays,