Sesional tree

[sonkan1]

Im making a rpg map and i came up with an idea(during lesson=)) and i thought it wuld be nice with a sesional tree thats based of the cityscape tree(summer) the tree shuld have 4 animations.
1-summer(from spring to summer with leafs coming up)
2-authumn(animation from summer to authumn with the changing collor)
3-winter(ani from authumn with snow coverd trees)
4-spring(ani from winter to spring with the snow melting)

please base the animations(witch shuld be a tree modle with 4 animations) of the cityscape tree thoug it wuld fit best in my map. thanks alot dudes!