在假期里,写一篇英文观察日记.用first then at last要中文翻译

我自己写的,仅供参考：
Butterfly
After the rain,the air got more fresh,and a butterfly flied into my room through the window.
At first,I didn't notice.Then the butterfly danced around my nose.She was so beautiful and danced so well.she was in black,with nice wings,slender figure and bright eyes.she was so gentle,like breeze walked through the wild.I was enchanted by her,I was dropped.
But at last,she flied away.