Stay loose and free.

这是2022年高考英语全国卷2七选五中的一句。

不太明白 loose and free 是什么意思？

附上下文：

First of all, lean the technique of nonstop writing. When you are first trying to think of ideas for an essay, put your pen to your paper and write nonstop for ten or fifteen minutes without letting your pen leave the paper. Stay loose and free. Let your pen follow the waves of thought. Don’t worry about grammar or spelling. Even though this technique won’t work for everyone, it helps many people get a good store of ideas to draw on.