KeyQuencer provides an easy way to create endless macros, i.e. macros that are repeated over and over until you stop them manually with a command-shift-return keystroke. If you use the Key command at the end of your macro, and have it type the key combination that was assigned to the macro itself, the macro will automatically restart every time it reaches the end. Here's an example where the first macro sets up the environment and calls the second, which is an endless macro:
Macro name: Finder counter
Macro key: cmd-opt-ctrl-c
Macro text:
SwitchApp "Finder"
Counter reset
Menu "Edit" "Show Clipboard"
Click zoombox opt
Key cmd opt ctrl shift "c"
Macro name: Finder counter loop
Macro key: cmd-shift-opt-ctrl-c
Macro text:
Counter increment copy
ChangeClip "The macro has run " before
ChangeClip " times." after
Wait 1 seconds
Key cmd shift opt ctrl "c"
(Remember: you must use command-shift-return to stop the loop).