I know of a very similar writing style where row one has a gradient from black to darkgray row two has a gradient from darkgray to black row three has a grad

I know of a very similar writing style where row one has a gradient from black to darkgray row two has a gradient from darkgray to black row three has a gradient from black to darkray repeating indefinitely. It helps you to move to the right next line. Not sure what it's called though