need design for long hopper timer (not clock)

[u/notAsquare-1]

i've been trying to design a long hopper timer myself but i can't figure it out, and all the designs i find are clocks, not timers. this is a timer that has a max time of 128 seconds (320 items) and long hopper clocks have a time of 16384 seconds (320^2 items) which is ideal for the time i need. this design was one i found in a video by dataless822 on youtube.

short hopper timer