diff --git a/computercraft/ni-ctl.lua b/computercraft/ni-ctl.lua
index 2147cbf..d385c64 100644
--- a/computercraft/ni-ctl.lua
+++ b/computercraft/ni-ctl.lua
@@ -271,6 +271,9 @@ local function scan_entities()
 		for _, entity in pairs(entities) do
 			entity.s = vector.new(entity.x, entity.y, entity.z)
 			entity.v = vector.new(entity.motionX, entity.motionY, entity.motionZ)
+            if entity.deltaPosX then
+                entity.v = vector.new(entity.deltaPosX, entity.deltaPosY, entity.deltaPosZ)
+            end
 			if entity.displayName ~= username then
 				hud_entities[entity.displayName] = (hud_entities[entity.displayName] or 0) + 1
 			end
diff --git a/ptt.py b/ptt.py
index 432a6b6..8b4e54f 100755
--- a/ptt.py
+++ b/ptt.py
@@ -50,7 +50,7 @@ def mute():
 	if not muted:
 		muted = True
 		print("muted")
-		subprocess.run(["pacmd", "set-source-mute", source, "1"])
+		subprocess.run(["pactl", "set-source-mute", source, "1"])
 		# this could call set_icon on the taskbar icon object directly, but that seems to inconsistently cause mysterious crashes in cairo
 		wx.PostEvent(app.taskbar_icon, MuteSetEvent(muted=muted))
 def unmute():
@@ -58,7 +58,7 @@ def unmute():
 	if muted:
 		muted = False
 		print("unmuted")
-		subprocess.run(["pacmd", "set-source-mute", source, "0"])
+		subprocess.run(["pactl", "set-source-mute", source, "0"])
 		wx.PostEvent(app.taskbar_icon, MuteSetEvent(muted=muted))
 
 def toggle():
diff --git a/screensaver.html b/screensaver.html
new file mode 100644
index 0000000..5a8ed09
--- /dev/null
+++ b/screensaver.html
@@ -0,0 +1,132 @@
+<!DOCTYPE html>
+<canvas id="d"></canvas>
+<script>
+function fade(t)
+{
+    return t * t * t * (t * (t * 6 - 15) + 10);
+}
+
+function lerp(t, a, b)
+{
+    return a + t * (b - a);
+}
+
+function grad(hash, x, y, z)
+{
+    // Convert lo 4 bits of hash code into 12 gradient directions.
+    var h = hash & 15,
+        u = h < 8 ? x : y,
+        v = h < 4 ? y : h == 12 || h == 14 ? x : z;
+    return ((h & 1) == 0 ? u : -u) + ((h & 2) == 0 ? v : -v);
+}
+
+function scale(n)
+{
+    return (1 + n) / 2;
+}
+
+var p = new Array(512);
+
+var permutation = [
+    151, 160, 137, 91, 90, 15, 131, 13, 201, 95, 96, 53, 194, 233, 7, 225, 140, 36, 103, 30, 69, 142, 8, 99,
+    37, 240, 21, 10, 23, 190, 6, 148, 247, 120, 234, 75, 0, 26, 197, 62, 94, 252, 219, 203, 117, 35, 11, 32,
+    57, 177, 33, 88, 237, 149, 56, 87, 174, 20, 125, 136, 171, 168, 68, 175, 74, 165, 71, 134, 139, 48, 27, 166,
+    77, 146, 158, 231, 83, 111, 229, 122, 60, 211, 133, 230, 220, 105, 92, 41, 55, 46, 245, 40, 244, 102, 143,
+    54, 65, 25, 63, 161, 1, 216, 80, 73, 209, 76, 132, 187, 208, 89, 18, 169, 200, 196, 135, 130, 116, 188, 159,
+    86, 164, 100, 109, 198, 173, 186, 3, 64, 52, 217, 226, 250, 124, 123, 5, 202, 38, 147, 118, 126, 255, 82,
+    85, 212, 207, 206, 59, 227, 47, 16, 58, 17, 182, 189, 28, 42, 223, 183, 170, 213, 119, 248, 152, 2, 44,
+    154, 163, 70, 221, 153, 101, 155, 167, 43, 172, 9, 129, 22, 39, 253, 19, 98, 108, 110, 79, 113, 224, 232,
+    178, 185, 112, 104, 218, 246, 97, 228, 251, 34, 242, 193, 238, 210, 144, 12, 191, 179, 162, 241, 81, 51,
+    145, 235, 249, 14, 239, 107, 49, 192, 214, 31, 181, 199, 106, 157, 184, 84, 204, 176, 115, 121, 50, 45,
+    127, 4, 150, 254, 138, 236, 205, 93, 222, 114, 67, 29, 24, 72, 243, 141, 128, 195, 78, 66, 215, 61, 156, 180
+];
+
+for (var i = 0; i < 256; i++) {
+    p[256 + i] = p[i] = permutation[i];
+}
+
+
+    /** Returns a number between 0 and 1. */
+function noise3d(x, y, z)
+{
+    // Find unit cube that contains point.
+    var X = Math.floor(x) & 255,
+        Y = Math.floor(y) & 255,
+        Z = Math.floor(z) & 255;
+    // Find relative x,y,z of point in cube.
+    x -= Math.floor(x);
+    y -= Math.floor(y);
+    z -= Math.floor(z);
+    // Compute fade curves for each of x,y,z.
+    var u = fade(x),
+        v = fade(y),
+        w = fade(z);
+    // Hash coordinates of the corners.
+    var A = p[X    ] + Y, AA = p[A] + Z, AB = p[A + 1] + Z,
+        B = p[X + 1] + Y, BA = p[B] + Z, BB = p[B + 1] + Z;
+
+    // Add blended results from 8 corners of cube.
+    return scale(
+        lerp(
+            w,
+            lerp(
+                v,
+                lerp(
+                    u,
+                    grad(p[AA], x, y, z),
+                    grad(p[BA], x - 1, y, z)
+                ),
+                lerp(
+                    u,
+                    grad(p[AB], x, y - 1, z),
+                    grad(p[BB], x - 1, y - 1, z)
+                )
+            ),
+            lerp(
+                v,
+                lerp(
+                    u,
+                    grad(p[AA + 1], x, y, z - 1),
+                    grad(p[BA + 1], x - 1, y, z - 1)
+                ),
+                lerp(
+                    u,
+                    grad(p[AB + 1], x, y - 1, z - 1),
+                    grad(p[BB + 1], x - 1, y - 1, z - 1)
+                )
+            )
+        )
+    );
+}
+
+let hues = ["180", "300", "60", "120"]
+let size = 1000
+let sc1 = 16
+let sc2 = 3
+let sc3 = 2.2
+let grid = 8
+let canvas = document.querySelector("canvas")
+canvas.width = canvas.height = size
+canvas.style.width = canvas.style.height = size + "px"
+let ctx = canvas.getContext("2d")
+let rec = () => {
+    let dt = Date.now() / 5000
+    ctx.fillRect(0,0,size,size)
+    for (let x = grid; x < size; x += grid) {
+        for (let y = grid; y < size; y += grid) {
+            let xn = noise3d(x/size/sc3,y/size/sc3,dt) * 2 - 1
+            let yn = noise3d(x/size/sc3,y/size/sc3,dt+3882) * 2 - 1
+            let sn = noise3d(x/size/sc3,y/size/sc3,dt+51235)
+            let cn = noise3d(x/size/sc3,y/size/sc3,dt+1114)
+            ctx.strokeStyle = `oklch(${sn * 50 + 50}% 80% ${cn * 360}deg)`
+            ctx.lineWidth = 2
+            ctx.beginPath()
+            ctx.moveTo(x + xn * grid * sc2, y + yn * grid * sc2)
+            ctx.lineTo(x + (xn ** 2) * grid * sc1, y + (yn ** 2) * grid * sc1)
+            ctx.stroke()
+        }
+    }
+    requestAnimationFrame(rec)
+}
+rec()
+</script>
diff --git a/wfc.html b/wfc.html
index 33b726d..d61a3d4 100644
--- a/wfc.html
+++ b/wfc.html
@@ -1,8 +1,8 @@
 <!DOCTYPE html>
 <canvas id="canv"></canvas>
 <input type="file" id="file">
-<div id="out"></div>
 <button id="step">Step</button>
+<div id="out"></div>
 <script>
     const write = line => {
         const out = document.querySelector("#out")
