frog or horse --- unknown artist ( Multistability )

I like the way which image is just using black and white color to confuse the humans vision. On the other hand, the picture is a little be hard to recognise when people look at firstly. I am try to rotate the picture so that make the image is more easy understand and much more fun to have a look the transformation between two animals.

It is same image,but just different angle to look at. The character of the Figure & ground is you can not see the two possibilities in one time. You see the frog ,and then see the horse which also is a swap from your right brain to your left brain.

http://images.google.com/imgres?imgurl=http://bbs.cityuu.com/UploadFile/2005-11/20051122205741490.jpg&imgrefurl=http://www.ahxf.gov.cn/p_bbs/showbbs.asp%3Fbd%3D1%26id%3D1630%26totable%3D1&h=395&w=400&sz=34&hl=zh-CN&start=3&sig2=h7_HW2FFQSokCUSV2dDqtQ&tbnid=fCq2aRDXXpyHCM:&tbnh=122&tbnw=124&ei=f_fHRtPbKKL4ggP_ytirAQ&prev=/images%3Fq%3D%25E9%25A9%25AC%25E8%25BF%2598%25E6%2598%25AF%25E9%259D%2592%25E8%259B%2599%26gbv%3D2%26svnum%3D10%26hl%3Dzh-CN%26sa%3DG