Step 7. Program structure

This program uses the following structure to define what code runs once at startup, and what code runs every time step:

// Can define global variables and constants up here, outside both functions = function() 
	// Instructions to be executed once, at start of run 
}; = function() 
	// Instructions to be executed every time step 

Note the chain brackets. These define the start and end of blocks of code. In the World so far, we did not define any "" because we did not have any code to execute on every step. For full reference on this structure, see the World and Mind docs.

We will now add some new code at certain locations within the structure.