Revolting Hen-coops

I am stuck on a riddle of the six stones. I try all differce ways and still can not do it. I need some more ways to do it. Here is the riddle: The upper row doesn't contain the purple nor red color , the blue stone is to the right of the yellows stone and the green one is right from the purple one. The blue stone is adjactcent only the white stone , red and green stones . Right to the right from the yellow stone goes the green stone and right above the blue stone goes the white one. There are two rows of threes. Now tell me where the stone goes? Where I can get the key from the guy to get to the big chicken. Please help me?