About the Noise effect
Noise fills every cell of the screen with characters from a twelve-step density ramp ( .,:;-~+*#%@ ). The value for each cell comes from multiplying a sine and a cosine of the cell's position plus time, which creates a rolling interference pattern: diagonal bands of dense symbols drift through lighter regions and dissolve into each other. Up close it looks like analogue TV static; from a distance the bands resolve into slow, liquid motion. Unlike the sparse effects, Noise covers the whole canvas, so it works as a texture rather than a backdrop for text. Put it behind a semi-transparent panel, crop it into a narrow banner, or use it full screen as a glitchy interlude. Grayscale white looks like a dead channel, green like a hacked terminal, and pink or purple like a vaporwave video wall.