Its quite useful displaying the bell schedule info of the day on the admin and teachers pagess header in PowerSchool. Here is how to do it:

1. Go to PS Administrator >> Custom Pages

2. Add this following code to wildcards/admin_header_css.txt and wildcards/teacher_header_css.txt

<span id="ssis-date" style="padding-right:20px;">
~[tlist_sql; select b.name as name, listagg(p.ABBREVIATION || ,) WITHIN GROUP ( ORDER BY bi.START_TIME) AS periods
    from ps.calendar_day c inner join ps.BELL_SCHEDULE b on c.BELL_SCHEDULE_ID = b.ID
        inner join ps.BELL_SCHEDULE_ITEMS bi on bi.BELL_SCHEDULE_ID = b.ID
        inner join ps.PERIOD p on p.ID = bi.PERIOD_ID
    where TO_CHAR(c.DATE_VALUE, DD-MM-YYYY) = TO_CHAR(CURRENT_DATE, DD-MM-YYYY)
        and c.SCHOOLID = ~(curschoolid)
    group by b.name; ]
    <span style="color:#195f7d">~(name):</span> ~(periods)
[/tlist_sql]
</span>

Requirement:  you have to setup the calendar for the day with a bellschedule (https://your.ps.addr/admin/schoolsetup/calendarsetup/calendarsetup.html)

Cain smelled something foul like rotten meat. Another room loomed through an archway before him, pitch black inside. He heard movement and a low, guttural snarl accompanied by the scraping of rock. Feeling exposed in the candlelight, he flattened himself against the wall and moved as quietly as a ghost to a corner between two bookcases.

The thing that emerged from the archway was so huge and incomprehensible that at first Cain had trouble processing the sight of it. It appeared to be made of human limbs and torsos all rolled together, along with a forest of jutting spikes of what looked like rock and timber. Two long arms ended in clubs rather than hands and sprouted the same shards of wood and stone. At least three separate heads grew from putrid, swollen flesh, white-filmed eyes rolling blindly in their sockets.

The monstrosity moved slowly and laboriously, and it had to duck to clear the arch, over ten feet off the floor. Its dripping shoulders nearly touched both sides of the opening as it leaned into the library, grunting with the effort. It seemed to have one main head in the center of its chest, and as it swung in Cain�s direction, those eyes fixed on his face.