added halftone CSS background pattern

Yuvrajchandra · Yuvrajchandra · commit 7a299f7fe321 · 2023-06-27T14:08:34.000+05:30
diff --git a/11. Generative Art/styles.css b/11. Generative Art/styles.css
@@ -12,12 +12,12 @@ body:before {
     mix-blend-mode: lighten;
   }
   
-  body {
+body {
     background: #00DFFC;
     margin: 0;
     min-height: 100vh;
   }
   
-  html {
+html {
     background: #fff;
   }
diff --git a/12. Halftone/index.html b/12. Halftone/index.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en" dir="ltr">
+    <head>
+        <meta charset="utf-8">
+        <title></title>
+        <link rel="stylesheet" href="styles.css">
+    </head>
+    <body>
+        <div></div>
+    </body>
+</html>
diff --git a/12. Halftone/styles.css b/12. Halftone/styles.css
@@ -0,0 +1,19 @@
+div {
+    position: relative;
+    height: 100vh;
+    background: #fff;
+    filter: contrast(7);
+    --mask: linear-gradient(red, rgba(0, 0, 0, 0.45));
+  }
+
+div::before {
+    position: absolute;
+    top: 0;
+    right: 0;
+    bottom: 0;
+    left: 0;
+    background: radial-gradient(#000, transparent) 0 0/1em 1em space;
+    -webkit-mask: var(--mask);
+    mask: var(--mask);
+    content: "";
+  }
