("concentric sinusoid", (x, y, t) => round((128d + (127d * sin(t + x / 8.0)) + 128d + (127d * sin(t + y / 4.0)) + 128d + (127d * sin((t + x + y) / 8.0)) + 128d + (127d * sin(t + sqrt(x * x + y * y) / 4d))) / 4d).toInt)