Can someone advice on me writing Japanese Haiku?

やまのいろ かわりはじめて ゆきのけり(The mountain’s colors start to change—
snow begins to fall.)
(山の色 変わり始めて 雪のけり)
this is what I wrote for my japanese haiku writing assignment

Is there any stilted points in my haiku. Especially grammar part(ex. grammar's to ancient) and structure.
Plus, those "keri" on the last is a "kireji", a must-have point for the assignment.

by siger717