jumpIn'
From TidalCycles userbase
jumpIn'
takes the identifier of the ControlPattern track and an integer cycleCount. It will jump at cycle boundary into the given pattern after cycleCount cycles have completed.
Example: Say you have this:
d1 $ sound "hh*4"
d2 $ sound "bd" --have a beat on the 1 for orientation
Then the subdivision on the hi-hat will increase 2 cycles after evaluation of the next line:
jumpIn' 1 2 $ sound "hh*8" --`1` because `d1`
The transition will align with the beat on cycle boundary.