Figure 10. The images in Figure 8 have a spin speed of one wavelength. In this figure, images A, B, C, D, E, and F have a spin speed of wavelengths 2, 3, 4, 5, 6, and 7, respectively. Here, I invoke my rule for amplitude addition. Pulses moving in a reverse direction have an amplitude that is reversed compared to pulses whose direction is not reversed. Therefore, pulses moving in opposite directions with the same amplitude cancel each other. The amplitudes with the even number wavelengths or spins cancel in all directions three-dimensionally because of my rule for amplitude addition. Images A, C, and E have spins of 2, 4, and 6, respectively, and they cancel entirely. It is the odd number spin speeds of B, D, and F, with spins 3, 5, and 7, that have stable structures for a wave source. Actually, all odd number (including 1) spins are stable. If a wave source like that in image B interfered with itself, it would create a wave source like that in image E. However, image E is an even number spin 6, and it cancels itself. Indeed, all stable odd number wave sources that interfere with an identical wave source would create an even number wave source that cancels itself. These characteristics parallel the behavior of elementary particles. Such particles exist at odd number spins of ½ spin, ³/2 spin, ⁵/2 spin, etc. Plus, if the particles interfere with themselves, they cancel according to the Pauli exclusion principle.