='symbol'>:source_h</span><span class='rbracket'>]</span>
  <span class='ivar'>@on_mouse_down</span>    <span class='op'>=</span> <span class='id identifier rubyid_sprite'>sprite</span><span class='lbracket'>[</span><span class='symbol'>:on_mouse_down</span><span class='rbracket'>]</span>     <span class='kw'>if</span> <span class='id identifier rubyid_sprite'>sprite</span><span class='lbracket'>[</span><span class='symbol'>:on_mouse_down</span><span class='rbracket'>]</span>
  <span class='ivar'>@on_mouse_