Bitbar: how to set bitbar plugin will not loop it's turn in Multi-line plugin ?

[liulover5]

how to set bitbar plugin will not loop in Multi-line plugin ?
eg (on mac):
data.1s.sh
echo "$(data)"
echo "today is good day, data: $(data)"

sometimes show:
2017年 4月 6日 星期四 23时04分25秒 CST
today is good day, data: 2017年 4月 6日 星期四 23时04分25秒 CST

sometimes show:
today is good day, data: 2017年 4月 6日 星期四 23时04分25秒 CST
2017年 4月 6日 星期四 23时04分25秒 CST

how to keep first cmd (echo "$(data)") show on first line (menu bar visible) ?
what make the turn changed ? (1s data flash is ok does not matter)
confused for one of plugin length is changed , before it's plugins jump jump jump...

[oleander]

Place --- between the first and the second row to prevent BitBar from cycling between them in the menu bar. The docs is a bit unclear about this behaviour but it seems like it cycles between each line above --- once every 5 second according to the source code; PluginTest.m#L28.

echo "$(data)"
echo "---"
echo "today is good day, data: $(data)"