旗帜

Foster a model and set/establish a good example.

The streets were gay with flags.

Flags were set up at every door.

The flags are streaming in the wind.

Flags wave high and low.

gather/rally under the banner of

raise the standard of revolution

wave/furl/unfurl a flag

hold aloft/up the banner of Marxism-Leninism

a flag/banner

Foster a model and set/establish a good example.