假设你是高中生李越，有感于校园中存在的随意涂写（to scribble) 和乱丢垃圾（to litter)的行为，请用英语给校长写一封100-120个词的信。信中应包括以下内容：
1. 说明写信目的；
2. 对这些行为进行批评；
3. 提出建议。
注意：信的抬头、落款及信得第一句已给出（不计词数）。
June 8 , 2011
Dear Mr. Headmaster ,
I am Li Yue ,a student from Class 1 ,Senior II .__________________
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Yours faithfully
Li Yue