The sine squared function always reduces to one half when averaged.

正弦平方函数 在平均时总是减少到一半。

Now to return this color outside of this function we simply use the return statement. So return. Now, our square function is very simple, it only had one line of code.

use the return statement. So return.现在，现在，我们的平方函数非常简单， 只有一行代码。