If I understand correctly…
Total 28mins
Level 1, Incline 4 for 4mins
Level 8, Incline 10 for 4mins
Level 1, Incline 4 for 4mins
Level 8, Incline 10 for 4mins
Level 1, Incline 4 for 4mins
Level 8, Incline 10 for 4mins
Level 1, Incline 4 for 4mins
Took me a couple reads to picture it as well 