Incrementing A Number In Loop?

[mku]

I've created a macros that successfully targets an already-opened app, then pauses for one minute (60 seconds) before what I'm hoping is a loop to occur:
 

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int w1=act(win("Untitled - Notepad" "Notepad"))
lef 167 72 w1 1 ;;editable text
'"word0001"           ;; "word0001"
wait 60

Can anyone enlighten me on how to not only loop the script , but also make "0001" increase by one on each loop until say "9999"? Much appreciated.