The left-handed yellow wave helix shows the traveling wave form.
This wave form is said to have negative helicity. The geometric algebra expression for it is:
q_omega (x,t) = a_omega exp(-i(omega t - kx)),
with a_omega the constant vector amplitude in the -i-bivector plane.
The set of green vectors shows how a vector at x=0 would rotate with varying t.
Compare the static interactive version.
Soli Deo Gloria. Created with Cinderella by Eckhard Hitzer (Fukui).