Step

In Game Maker and ENIGMA,
a step is an event execution cycle performed each
frame. The number of steps occurring every second is defined as the
room_speed. The default room speed is 30. This
means that by default, a step is executed every 1/30 of a second. The
screen is also redrawn each step.

Every step, certain variables are updated,
objects are moved according to their speed and
direction, and then the relevant events for objects
are performed. Around the Draw event (one of the last events), the game
screen is redrawn with all the newly calculated positions and animation
subimages and/or custom drawing. A few more events (such as the End
Step) are performed, and some final calculations are made. Then that
step finishes.

This whole cycle continues to repeat from game start to game end.