以“I want to change"为主题,写一篇较短的英语演讲稿,120字左右吧

这个应该符合您的要求；
Honoriable judger and my dear fellows,I’m glad to be here to deliver my presentation to you.today.my topic is I want to change
To explain this issue,Let’s go back to our childhood..When we were little boys and little girls ,everything is so simple that just the black and white could distinguish.However ,when we grow up ,we find that the world is not perfect ,and people are not so harmonious.we are yelling to changing the situation all around.yet none of us even notice that we can change ourselves to adjust to it instead.
As obama once said:I can not change the world but change myself.
We can not change the situation.but changing to adapt to the situation.
thanks!

I want to change the world ，哈哈