Here is the UNPACKED source.

function u() { requestAnimationFrame(u);

    for (g = p ? B.currentTime * 60 : (B = 'RIFFdataWAVEfmt ' + atob('EAAAAAEAAQAAeAAAAHgAAAEACAA') + 'data', b.style.background = 'radial-gradient(circle,#345,#000)', b.style.position = 'fixed', b.style.height = b.style.width = '100%', b.height = 720, h = b.style.left = b.style.top = A = f = C = 0, 6177); g > f; h *= f % 1 ? 1 : .995)
        for (s = Math.pow(Math.min(f / 5457, 1), 87) + Math.pow(1 - Math.min(f / 5457, 1), 8), f == [b.width = 1280, 1599, 2175, 2469, 2777, 3183, 3369, 3995, 4199, 4470, 4777, 5120][C] && (C++, h = 640), f += p ? (c.translate(640, 360 + h / 45 * Math.random()), c.rotate(A / 5457 - h / 5457), c.scale(1 + s * 8, 1 + s * 8), 1) : (B += T((1 + s * 8) * Math.random() + (1 - s) * (h / 45 * (f * (2 + C / 3 % 1) & 1) + (C > 3) * 8 * (f * (2 + (f / 8 & 3)) % 1)) | 1), 1 / 512), i = p.length; i;) y = p[i -= 7], x = p[i ^= 1], r = p[i + 4], l = p[i + 6], s = 2 * Math.random() + 1, t = s * 4, a = 122, 640 > r ? (640 > Math.abs(p[i ^= 1] += p[i + 2]) || (p[i + 2] *= -1), 640 > Math.abs(p[i ^= 1] += p[i + 2]) || (p[i + 2] *= -1), t = Math.random() > p[i + 7] || p[i + 7] == '22312131212313' [C] & h == 640, w = x - A, p[i + 2] || r * r / 3 > w * w && (t = s * (r - Math.abs(w)) / 45 + 2, a = 2 * Math.random() + 5, p.push(A, 0, s * Math.sin(a += 599), s * Math.sin(a - 11), s * t, C + s, 640, .995), s = 2 * Math.random() + 1, a = 2 * Math.random() + 5, p.push(A, 0, s * Math.sin(a += 599), s * Math.sin(a - 11), s * t, C + s, 640, .995), s = 2 * Math.random() + 1, a = 2 * Math.random() + 2, p.push(A, 0, s * Math.sin(a += 599), s * Math.sin(a - 11), s * t, C + s, 640, .995)), a = p[i + 2] * y / 45, l = p[i + 6] = t ? 640 : .9 * l, t = r) : A = p[i] ++, g > f || (s = r, c.beginPath(), c.lineTo(x + s * Math.sin(a += 599), y - s * Math.sin(a - 11)), s = t, c.lineTo(x + s * Math.sin(a += 599), y - s * Math.sin(a - 11)), c.lineTo(x + s * Math.sin(a += 599), y - s * Math.sin(a - 11)), c.shadowBlur = r, s = l, x = s * 2, a = p[i + 5], c.shadowColor = c.fillStyle = 'rgb(' + [x + s * Math.sin(a += 599) | 1, x + s * Math.sin(a += 599) | 1, x + s * Math.sin(a += 599) | 1] + ')', c.fill());
    p ? c.fillText('BLCK4777', 90, 99) : (B = new Audio('data:Audio/WAV;base64,' + btoa(B))).play(p = [f = C = 0, 0, 0, 0, 180, 2, 0, 1, -360, 0, 0, 0, 99, 1, 0, 2, 360, 0, 0, 0, 99, 1, 0, 3, -2880, 0, 0, 0, 1280, 0, 1280, 0])

};