Read the sentence.

Growing on the side of the road, I noticed some bright pink and purple flowers.

Which is the best revision of this sentence?

Some bright pink and purple flowers, I noticed growing on the side of the road.
I noticed, growing on the side of the road, some bright pink and purple flowers.
Growing on the side of the road, some bright pink and purple flowers I noticed.
I noticed some bright pink and purple flowers growing on the side of the road.