diff --git a/index.html b/index.html
index 16840fe..e889079 100644
--- a/index.html
+++ b/index.html
@@ -31,11 +31,6 @@
         <input id="scale" type="number" min="1" value="40">
         px per module
       </label>
-      <label for="gap">
-        <span>Grid gap:</span>
-        <input id="gap" type="number" min="0" value="0">
-        px between modules
-      </label>
       <button id="gen-btn">Generate</button>
     </div>
     <div>
diff --git a/script.js b/script.js
index 63413ec..59f8fa5 100644
--- a/script.js
+++ b/script.js
@@ -3,50 +3,6 @@ function intDiv(a, b) {
   return ~~(a / b)
 }
 
-let getCodeVersion
-
-const alignmentCoords = [
-  [6, 18],
-  [6, 22],
-  [6, 26],
-  [6, 30],
-  [6, 34],
-  [6, 22, 38],
-  [6, 24, 42],
-  [6, 26, 46],
-  [6, 28, 50],
-  [6, 30, 54],
-  [6, 32, 58],
-  [6, 34, 62],
-  [6, 26, 46, 66],
-  [6, 26, 48, 70],
-  [6, 26, 50, 74],
-  [6, 30, 54, 78],
-  [6, 30, 56, 82],
-  [6, 30, 58, 86],
-  [6, 34, 62, 90],
-  [6, 28, 50, 72, 94],
-  [6, 26, 50, 74, 98],
-  [6, 30, 54, 78, 102],
-  [6, 28, 54, 80, 106],
-  [6, 32, 58, 84, 110],
-  [6, 30, 58, 86, 114],
-  [6, 34, 62, 90, 118],
-  [6, 26, 50, 74, 98, 122],
-  [6, 30, 54, 78, 102, 126],
-  [6, 26, 52, 78, 104, 130],
-  [6, 30, 56, 82, 108, 134],
-  [6, 34, 60, 86, 112, 138],
-  [6, 30, 58, 86, 114, 142],
-  [6, 34, 62, 90, 118, 146],
-  [6, 30, 54, 78, 102, 126, 150],
-  [6, 24, 50, 76, 102, 128, 154],
-  [6, 28, 54, 80, 106, 132, 158],
-  [6, 32, 58, 84, 110, 136, 162],
-  [6, 26, 54, 82, 110, 138, 166],
-  [6, 30, 58, 86, 114, 142, 170],
-]
-
 addEventListener('DOMContentLoaded', () => {
   const canvas = document.getElementById("canvas")
   const ctx = canvas.getContext("2d")
@@ -57,73 +13,24 @@ addEventListener('DOMContentLoaded', () => {
     size: document.getElementById("width"),
     ver: document.getElementById("version"),
     scale: document.getElementById("scale"),
-    gap: document.getElementById("gap"),
   }
 
   document.getElementById("gen-btn").addEventListener("click", () => {
     const mask = options.mask.value
-    const size = Number(options.size.value)
-    const scale = Number(options.scale.value)
-    const gap = Math.min(Number(options.gap.value), scale) // not more than 1 module scaled size
-
-    const wh = scale - gap * 2 // width&height for 1 module with grid gap
+    const size = options.size.value
+    const scale = options.scale.value
 
     canvas.width = canvas.height = size * scale
 
     ctx.clearRect(0, 0, canvas.width, canvas.height)
-    ctx.fillStyle = "black"
 
     for (let row = 0; row < size; row++) {
       for (let col = 0; col < size; col++) {
         if (eval(mask) == 0) {
-          ctx.fillRect(col * scale + gap, row * scale + gap, wh, wh)
+          ctx.fillRect(col * scale, row * scale, scale, scale)
         }
       }
     }
-
-    const idSize = 8 * scale
-
-    { // finder pattern
-      ctx.fillStyle = "rgba(224, 63, 102, 0.5)"
-
-      ctx.fillRect(0, 0, idSize, idSize)
-      ctx.fillRect(canvas.width - idSize, 0, idSize, idSize)
-      ctx.fillRect(0, canvas.height - idSize, idSize, idSize)
-    }
-
-    const ver = getCodeVersion()
-
-    if (ver > 1) { // alignment pattern
-      ctx.fillStyle = "rgba(209, 63, 224, 0.5)"
-
-      const alignSize = 5 * scale
-      const coords = alignmentCoords[ver - 2] // array begins with version 2
-      const len = coords.length
-
-      for (let i = 0; i < len; i++) {
-        for (let j = 0; j < len; j++) {
-          const row = coords[i], col = coords[j]
-          if (row < 8 && col < 8 || row < 8 && col > size - 8 || row > size - 8 && col < 8) {
-            // do not overlap with finder pattern
-            continue
-          }
-          ctx.fillRect((row - 2) * scale, (col - 2) * scale, alignSize, alignSize)
-        }
-      }
-    }
-
-    { // timing pattern
-      ctx.fillStyle = "rgba(76, 63, 224, 0.5)"
-
-      const idEndPos = 6 * scale
-      const betweenIds = canvas.width - idSize * 2
-      ctx.fillRect(idSize, idEndPos, betweenIds, scale)
-      ctx.fillRect(idEndPos, idSize, scale, betweenIds)
-    }
-
-    { // format info
-      // TODO
-    }
   })
 
   { // Choose best scale for screen height
@@ -138,7 +45,7 @@ addEventListener('DOMContentLoaded', () => {
     const MIN_VER = 1
     const MAX_VER = 40
 
-    getCodeVersion = () => {
+    const getCodeVersion = () => {
       const size = options.size.value
       return Math.floor((size - MICRO_4) / DIFF)
     }
diff --git a/style.css b/style.css
index 9a807d6..a4d7014 100644
--- a/style.css
+++ b/style.css
@@ -3,17 +3,14 @@ body {
   padding: 0.5rem;
 }
 
-body > div {
-  width: fit-content;
-  margin: auto;
-}
-
-body > div#options {
+#options {
   display: flex;
   flex-direction: column;
   row-gap: 0.25rem;
 
+  width: fit-content;
   max-width: calc(100vw - 0.5rem * 2);
+  margin: auto;
 }
 
 select, input, button {
@@ -23,7 +20,7 @@ select, input, button {
 }
 
 input[type=number] {
-  width: calc(4rem + 0.125rem * 2);
+  width: calc(1rem * 4 + 0.125rem * 2);
 }
 
 label {
@@ -38,11 +35,6 @@ label#width-wrapper > button {
 }
 
 label > span:nth-child(1) {
-  width: 5rem;
+  width: calc(3.5rem);
   text-align: right;
 }
-
-canvas {
-  margin-top: 0.5rem;
-  border: 2px solid #555;
-}