Did you know you can make some music with the traffic monitors?

I can make short and long notes with "Cargo pass" and "pass". With pass you can make longer notes the length of the cycle. It is possible to make notes of different lengths with bunches of items passing and then "fail and cargo pass", but this messes with the timing as well, so I didn't use that.

Paste this blueprint at the equator: the belts get slightly lengthened/shortened off-equator, causing desynchronization...

To play:
First provide power source. Then load the box with 7 items of your choice and then place a power pole to power to start playing. The 7 items should be in the 'start position' before the white sorters. Then you power the white sorters so all items go into the loop at the same time.