(1) The family set off on holiday. (2) They stopped off for a picnic in the park. (3) On the horizon, a rainbow appeared. (4) They waited for the rain to stop.
将句子重新排列成连贯的故事，输出故事。
全家出发去度假，并在公园野餐。等待雨停时，天边出现了一道彩虹。