Hi …,
Thanks for getting in touch.
The green sections indicate the regular patterns of 3, e.g. chh-chh-ohh. The „in-between“ white areas are also patterns of 3, but I used the alternating colors (green – white – green – white – green) to indicate the ongoing 3-pattern sequence. The last 16th note of the bar breaks the „flow“ when playing these patterns of 3, as the bar itself is written in 4/4 time, coming down to 16 16th notes, while 5 patterns of 3 come down to 15 16th notes and drive the perception that this pattern needs to go on like this.
The last note which is highlighted in red is only there to indicate where the feel breaks.
As a note beside… playing a 3-feel over a 4/4 bar actually creates a polyrhythmic pattern, which is sonically very interesting and which is very often applied in drum fills. As this concept is introduced for the first time at this stage of the eCourse, my intention was to make the audible feel-break visually clear.
Hope this helps. Any questions – please let me know.
Best regards
Andreas