Answer:
Along the road for several miles, we saw fields of bright yellow sunflowers.
Step-by-step explanation:
Perhaps the comma(s) should be inserted between the words "road" and "for" because it sounds more proper, but I think there's a rule that after two FANBOYS (for, and, nor, but, or, yet, and so), then you should insert the comma. There is no comma between the word "bright" and "yellow" since the adjectives aren't the same. The adjective "bright" describes the volume (the shade) of the color "yellow", so there shouldn't be a comma between the two. I hope that this helps in any shape or form.