references

https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=2ahUKEwjKsrzWv_PZAhWGr6QKHajEDXIQjRx6BAgAEAU&url=http%3A%2F%2Fcabschau.centerblog.net%2F9270-un-cheval-au-galop&psig=AOvVaw0X1-IWgBPxKn_5fT9OokKK&ust=1521380776654791

https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&ved=2ahUKEwj946Gix_PZAhVO-qQKHZkKCi8QjRx6BAgAEAU&url=http%3A%2F%2Fwww.valdesfees.be%2Fpages%2Fcheval-pieds-nus%2Fun-cheval-pieds-nus.html&psig=AOvVaw0X1-IWgBPxKn_5fT9OokKK&ust=1521380776654791

https://www.fr.fnac.ch/Ravensburger-Puzzle-XXL-Chevaux-dans-la-brume-200-pieces/a5250207

https://xnienke.deviantart.com/art/Texture-21-205095290

https://www.google.com/url?sa=i&source=images&cd=&cad=rja&uact=8&ved=2ahUKEwiIt-u3gbXbAhVH46QKHQj5ARUQjRx6BAgBEAU&url=https%3A%2F%2Fwww.pinterest.co.uk%2Fpin%2F304696731030896959%2F&psig=AOvVaw0hzFm25JKG_jXH7l59rgP9&ust=1528029988539864