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I approached this by looking at the result you want to achieve, which I think is some random coloration to the windows. I put the black "windows" on it's own layer. I made a new layer and filled it with 50% grey, then added a reticulation filter with colors set to white and grey. On this layer I used the magic wand to select a color (variation of grey). Then on a new layer I filled the selection with red (just so it would show well). I used transform to make the fill much larger and then clipped it to the black boxes. After that I used a motion blur on it.