Some bugs are periodically at random simulated, so those waveforms whistle, curl, curve, warp, then for a moment write the decimal numbers ... and even in plain text. Just enough to confuse observers, and then again return to "those awful waveforms."
At the same time, the color of the environment is also plays its game, so this clock is never in the steady state. It is actually a story about the buggy software and glitchy hardware.