Script Writer showing a simple Equipment On/Off Macro.  You use the Script Writer if you need to write custom Macros that have more commands or steps then are available with the Button Editor.  Macros can have up to 50 steps with up to 50 commands per step.  Commands can be a mixture Infrared, Power line X10, Switch Closure, RS232, and even launch other applications on your PC.  You can also set or clear flags, which can be used by other Macros for conditionality.