diff --git a/src/pages/_page.jsx b/src/pages/_page.jsx
index e104a32..06dbbe0 100644
--- a/src/pages/_page.jsx
+++ b/src/pages/_page.jsx
@@ -1,9 +1,26 @@
 import { useState, useEffect, useRef } from 'react';
 import { motion } from 'framer-motion';
 import QRcode from 'qrcode';
+
+const Button = ({ children, onClick, isActive }) => {
+  return (
+    <button
+      className={`transition w-full h-full hover:bg-black hover:text-white ${
+        isActive ? 'bg-black text-white' : ''
+      }`}
+      onClick={onClick}
+    >
+      {children}
+    </button>
+  );
+};
+
 export default function Page() {
   const ref = useRef();
   const [data, setData] = useState('');
+  const [errorCorrectionLevel, setErrorCorrectionLevel] = useState('L');
+  const [maskPattern, setMaskPattern] = useState(undefined);
+  const [version, setVersion] = useState(undefined);
   useEffect(() => {
     QRcode.toString(
       data,
@@ -11,9 +28,12 @@ export default function Page() {
         type: 'svg',
         margin: 0,
         color: { dark: '000000FF', light: '00000000' },
+        errorCorrectionLevel,
+        maskPattern,
+        version,
       },
       (err, qrc) => {
-        err ? err : (ref.current.innerHTML = qrc);
+        err ? console.log(err) : (ref.current.innerHTML = qrc);
         err
           ? (ref.current.style.backgroundColor = 'red')
           : (ref.current.style.backgroundColor = 'transparent');
@@ -23,19 +43,130 @@ export default function Page() {
   return (
     <motion.section
       animate={{ opacity: [0, 1] }}
-      className="flex justify-center items-center h-full w-full"
+      className="flex justify-center items-center h-full w-full text-[1.55vh]"
     >
       <main className="aspect-[1/2] h-full bg-white text-black grid auto-rows-fr">
         <section
           ref={ref}
           style={{ display: data ? 'grid' : 'none' }}
-          className="p-[3vmin]"
+          className="p-[1.5rem]"
         />
         <section
           style={{ display: data ? 'none' : 'grid' }}
-          className="p-[3vmin]"
-        ></section>
-        <section className="p-[3vmin] border-t border-black">
+          className="p-[1.5rem] grid-flow-row-dense w-full h-full"
+        >
+          <div>QRcode</div>
+          <div className="grid grid-flow-row-dense w-full h-full items-end">
+            <div>version</div>
+            <div className="grid grid-cols-10 w-full h-full">
+              <div className="col-span-full">
+                <Button
+                  onClick={() => {
+                    setVersion(undefined);
+                  }}
+                  isActive={version === undefined}
+                >
+                  AUTO
+                </Button>
+              </div>
+              {[
+                '1',
+                '2',
+                '3',
+                '4',
+                '5',
+                '6',
+                '7',
+                '8',
+                '9',
+                '10',
+                '11',
+                '12',
+                '13',
+                '14',
+                '15',
+                '16',
+                '17',
+                '18',
+                '19',
+                '20',
+                '21',
+                '22',
+                '23',
+                '24',
+                '25',
+                '26',
+                '27',
+                '28',
+                '29',
+                '30',
+                '31',
+                '32',
+                '33',
+                '34',
+                '35',
+                '36',
+                '37',
+                '38',
+                '39',
+                '40',
+              ].map((v, key) => (
+                <Button
+                  key={key}
+                  onClick={() => {
+                    setVersion(v);
+                  }}
+                  isActive={version === v}
+                >
+                  {v}
+                </Button>
+              ))}
+            </div>
+          </div>
+          <div className="grid grid-flow-row-dense w-full h-full items-end">
+            <div>mask pattern</div>
+            <div className="grid grid-cols-8 w-full h-full">
+              <div className="col-span-full">
+                <Button
+                  onClick={() => {
+                    setMaskPattern(undefined);
+                  }}
+                  isActive={maskPattern === undefined}
+                >
+                  AUTO
+                </Button>
+              </div>
+              {['0', '1', '2', '3', '4', '5', '6', '7'].map((mp, key) => (
+                <Button
+                  key={key}
+                  onClick={() => {
+                    setMaskPattern(mp);
+                  }}
+                  isActive={maskPattern === mp}
+                >
+                  {mp}
+                </Button>
+              ))}
+            </div>
+          </div>
+          <div className="grid grid-flow-row-dense w-full h-full items-end">
+            <div>error correction level</div>
+            <div className="grid grid-flow-col-dense w-full h-full">
+              {['L', 'M', 'Q', 'H'].map((ecl, key) => (
+                <Button
+                  key={key}
+                  onClick={() => {
+                    setErrorCorrectionLevel(ecl);
+                  }}
+                  isActive={errorCorrectionLevel === ecl}
+                >
+                  {ecl}
+                </Button>
+              ))}
+            </div>
+          </div>
+        </section>
+        <section className="p-[1.5rem] border-t border-black">
           <textarea
             className="outline-none bg-transparent w-full h-full resize-none font-['JetBrains_Mono']"
             onChange={(e) => setData(e.target.value)}