# Configuration settings - edit to your needs 
path = "~/lapse"     # directory where images will be stored. must exist and be writable.
duration = 4 * 60 * 60  # Time to run, in seconds (4 hours here)
interval = 5 * 60       # time between each photo, in seconds (5 minutes here)

# Start working...
end_at = Time.now + duration

i = 0
while Time.now <= end_at do
 i += 1
 system 'say "cheese"'	# comment out if sound not wanted
 system "/Applications/isightcapture #{path}/%05d.jpg" % i
 sleep interval
end