nodeocore clock 2 [OPTICS SPOILERS] (flashing lights)

same idea as the [other clock](https://spectra.video/w/2p6YhdkTHzZGkGgtUkB8CJ), but with a shorter cycle, and fitting in 2D. texture pack used is [wintercore detailed](https://content.luanti.org/packages/Winter94/wintercore_detailed/).