In the ALMA diagram, The clocks are obviously located in the universe #3. that is moving, "flowing" to use your words, out from the point #4 inside time #1 into the infinite future, still time #1; Since we are in the universe, that movement is the "flow of us". The clocks measure that rate of movement, and the distance moved through time #1. Like the instrument on your vehicle that indicates the current speed, and the distance traveled since the beginning . and the last reset. The road, time #1 is stationary, we travel, one way into the future. The name, "one way" says it. The laws of the universe demand a one way travel through time, no matter what the direction is. It is always in infinite time #1. but even if you should get stuck, like in a black hole, you still would be in time #1, just not moving along with the rest of us, please search in the 30 ish pages of ALMA. Time is not movement, but an infinite, fundamental dimension. No. #1.