change electro bg

app.js

@@ -455,7 +455,7 @@ class Settings {
                 if (localStorage[element.name]) element.value = localStorage[element.name]
             }
         }
-        document.selectedStyleSheetSet = stylesheetSelect.value
+        window.document.selectedStyleSheetSet = stylesheetSelect.value
     }
 
     save() {
@@ -499,6 +499,10 @@ class Settings {
     }
 }
 
+window.onload = function (event) {
+    window.document.selectedStyleSheetSet = stylesheetSelect.value
+}
+
 function changeKey(input) {
     prevValue = input.value
     input.value = ""
@@ -835,10 +839,10 @@ let playerActions = {
             scheduler.clearTimeout(lockDown)
     
             let heldPiece = holdQueue.piece
+            matrix.piece.facing = FACING.NORTH
             holdQueue.piece = matrix.piece
             holdQueue.piece.holdEnabled = false
             holdQueue.piece.locked = false
-            holdQueue.piece.facing = FACING.NORTH
             generate(heldPiece)
         }
     },

css/electro.css

@@ -1,9 +1,24 @@
+body {
+    background-image: url("electro/bg.png");
+    background-size: cover;
+}
+
+.card {
+    background-color: rgba(37, 41, 45, 50%);
+}
+
+@supports (backdrop-filter: blur()) {
+    .card {
+        background-color: rgba(33, 37, 41, 20%);
+        backdrop-filter: blur(3px);
+    }
+}
+
+
 .mino {
-    background-image: radial-gradient(
-        farthest-corner at 4px 6px,
+    background-image: radial-gradient(farthest-corner at 4px 6px,
             rgba(204, 238, 247, 0.3) 0%,
-        rgba(106, 197, 220, 0.3) 100%
-    );
+            rgba(106, 197, 220, 0.3) 100%);
     border: 1px solid rgba(127, 229, 255, 0.7);
     border-radius: 0.3vmin;
     box-shadow: -1px -1px 4px rgba(128, 128, 128, 25%),

css/retro.css

@@ -102,8 +102,14 @@ td {
     background-image: url("retro/Z-mino.png")
 }
 
+@keyframes blinker {
+    50% {
+        opacity: 0;
+    }
+}
+
 .locked.mino {
-    filter: saturate(60%) brightness(200%);
+    animation: blinker 0.15s step-start infinite;
 }
 
 .ghost.mino {