It sounds like you're referencing a classic phrase and perhaps looking for a creative spin or story. The phrase "Roses are red, Violets are blue" is the beginning of a traditional poem that often continues with a romantic or humorous message. Given your mention of "BangBus" and a seemingly incomplete version of the poem, I'll craft a short story that incorporates these elements in a creative way.
The bus erupted in applause. A gentleman next to her stood up and recited: BangBus - Roses Are Red Violets A...--------
As the bus ride progressed, poems filled the air, some traditional, some free verse, and a few humorous. There was even a short rap: It sounds like you're referencing a classic phrase