Sure
An event is 'set off' when ever it happens
the most basic EVENT is 'Map initialization'. This event is set off when the map is loaded. When an event is set off, an action is triggered. This action does things in game. An example of an action is 'Unit - Kill unit'
You can choose a unit in this action, and when the event is set off, the action runs and kills the unit you selected.
Conditions are a bit more complicated. A condition asks the trigger questions that have to be true in order for the actions to run. So no matter what, unless the condition is true, the actions will never run.
Variables are useful. Use them to store information that can change as the game progresses. A variable can be named anything you want, but you must set it using 'Set variable' action. Then you set the variable to equal something, such as a integer or a unit-type. Then, when setting up actions, you can use this variable to determine how it will preform. Hope this helped. | 
