青蛙过河，六只小青蛙过河小游戏。

适合在移动端展示

就是有7块石头，6只青蛙要过河，结束应该是3只公的和3只母的换个位置和方向，

一款很经典的过河游戏。-Frogs, six little frogs across the river.

Fit in the mobile terminal display

There are 7 stones, 6 frogs to cross the river, the end should be 3 male and 3 female in the position and direction,

A very classic game.