Zig Zag:

A line is a line
It goes straight on,
At least that is how
A line should be drawn.

So let's get this straight
They call me Zig Zag,
And I'm a fancy line
But I don't mean to brag,

I go back and forth
Can't make up my mind,
And for that reason
I'm not a straight line.

I am also a pattern
That's why I'm fancy,
I'm two things in one
Now ain't that handy.

If it's a crooked line
Or a pattern you need,
Then maybe you need
A Zig Zag like me.