The code and discussion is related to the Blech example blinker
The follwing code - which is part of the main activity in the original example - sequentialises the concurrent execution of two activities in order to change the output blinkerLeverPos.
Although it is perfectly correct it is quite complicated. The sequential data-flow has to be organised explicitly.
activity monitorBlinkerLever(rotation: int32, blinkerLeverMove: int32)(blinkerLeverPos: int32)
var movedBlinkerLeverPos: int32
var localBlinkerLeverPos = blinkerLeverPos