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$ ->
log = (x) ->
console.log x
img = $('#img')
w = img.prop('width')
left = img.position().left
compass = 1
num = 0
diff = 0.3
setInterval ->
num += 1
if num == 0
compass = 1
else if num == 500
compass = -1
if compass > 0
w += diff
left -= diff
else
w -= diff
left += diff
img.css({
'left' : left
'width' : w
})
, 100
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