Those aren't chunks, those are streaming Doppler waves. EM radiation has a duty cycle, not an alternating frequency. My experiment shows this.
Think of a wheel hub and spokes but no rim, just spokes. Spin hub. Release spokes. All the spokes are emitted in an instant and all spokes are already at velocity, when emitted, all they did was change direction.
Immediately after emitted, new spokes start to grow. They grow to a length of 1/2 wavelength, which is 180 degrees, then emitted. New spokes grow every 180 degrees and are emitted.
That gives a spoke duration of 1/2 period, 1/2 wavelength fly by..... AND a 1/2 period, 1/2 wavelength of space fly by(duration)...... in between every chunk. Between spokes.
That's with no relative displacement. If there is displacement.... ONLY the space duration changes with distance change..... NOT the spoke length. Spoke length stays constant.
The redshift shift is a duty cycle shift. But only the space of the duty cycle change, not photon length.