imageLikeVideo.coffee

$ ->
  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