Colored flags, scrolls, and balloons installed on publicly owned positions, or positions owned by the business itself or by other persons.

利用公共、自有或者他人所有的阵地设置的彩旗、条幅、气球等。

youdao

Some of the victims' relatives were at the vigil and one brightly colored group stood out: family and friends of Micayla Medek dressed in hot pink and holding polka-dot balloons.

WSJ: Services, Vigil Remember Victims