Dancing Script Rainbow runs a full spectrum through handwritten neon. The script draws itself on, the colour cycles along the stroke rather than sitting flat, and the whole word floats and flickers — the most exuberant of the neon set.
Dancing Script gives the connected handwriting; the rainbow is a gradient carried along the stroke, so the colour moves through the letterforms instead of the letterforms changing colour. drawStroke, flicker and float run at staggered offsets.
If you want one colour in a handwritten neon, Neon Cursive Glow is the style built for that — it is the same idea with a warm monochrome palette.