In the colored spectrum above you can see how the numbers work in relation to the number 9. It also corresponds with the sequence of the base 10 count. The 0 and 9 are the beginning and end points or opposing nodes and the 180 point on the spectrum is defined by the two central pairs of 4’s and 5’s which total 18(0). Either side of these two pairs are the numbers running 1 to 3 and beneath that 6 to 8. Add 1+2+3 = 6 and 6+7+8=21 which is rooted to (3) and you can see that the colored spectrum from 0 to 180 corresponds with the standing (number) wave beneath it which runs 0 to 4 (drops down to 5) and then back 5 to 9.
In essence it loops. The same principle applies to the numbers on the other side of the colored spectrum in relation to the standing (number) wave because its a mirrored (180 degree reverse) image. You can see with the standing (number) wave diagram that there are two smaller loops or cycles within a bigger loop or cycle.