For the seventh time.

my reply For the seventh time, I'm not giving you the answer.

The rainbow stretched across the sky from the ice cream truck to the house down the lane.
my reply The rainbow stretched across the sky, from the ice cream truck, to the house down the lane.

The rainbow stretched across the sky, from the ice cream truck, to the house down the lane.

In this sentence, I don't believe that any commas are needed.

See the site below. Look particularly at the example with multiple prep. phs.

(Broken Link Removed)

I agree with GuruBlue. No commas needed.

In the sentence "The rainbow stretched across the sky from the ice cream truck to the house down the lane," no commas are needed. Commas are generally used to separate items in a list, to indicate a pause or break in a sentence, or to separate clauses or phrases. In this case, there is no need for a comma because the sentence is simply describing the location of the rainbow, from the ice cream truck to the house down the lane.

If you want to verify the usage of commas in a sentence, you can consult grammar guides, such as websites or books that provide rules and examples for punctuation. The website you mentioned, however, appears to have a broken link, so it might not provide the necessary information. I recommend searching for reliable grammar websites or referring to trusted grammar books for accurate explanations on comma usage.