diff --git a/delete.php~ b/delete.php~
deleted file mode 100644
index 1b120c2..0000000
--- a/delete.php~
+++ /dev/null
@@ -1,27 +0,0 @@
-<?php
-require "${_SERVER['DOCUMENT_ROOT']}/database.php";
-
-
-$mysqli = set_mysql ('miteruzo_bbs');
-
-$mysqli -> set_charset ('utf8');
-
-$thread = $_GET['thread'];
-$id = $_GET['id'];
-$pass = $_GET['pass'];
-
-if ($result = $mysqli -> query ("
-        SELECT
-          pass
-        FROM
-          responses
-        WHERE
-          (thread_id = {$_GET['thread']}) AND (response_id = {$_GET['id']})")):
-    $row = $result -> fetch_assoc ();
-
-    if ($_GET['pass'] == $row['pass']):
-    else:
-        echo "残念．\n削除用パスワードが違います．<script>setTimeout (function () {window.location.href = `./?thread=$thread`}, 5000)</script>";
-    endif;
-endif;
-
diff --git a/style.css~ b/style.css~
deleted file mode 100644
index 8e79ba5..0000000
--- a/style.css~
+++ /dev/null
@@ -1,79 +0,0 @@
-body
-{
-  background-color: aquamarine;
-}
-
-table
-{
-  margin: 24px auto 40px;
-}
-
-td
-{
-  padding: 8px;
-}
-
-table, td
-{
-  border: solid 1px;
-  background-color: white;
-}
-
-#paint
-{
-  margin-bottom: 64px;
-}
-
-#paint > div
-{
-  margin: 24px auto;
-}
-
-h1, .illust
-{
-  text-align: center;
-}
-
-.radio
-{
-  /* width: 704px; */
-  /* display:        inline-block; */
-  align-items:    flex-start;
-  vertical-align: middle;
-  line-height:    1.5em;
-  margin:         auto;
-}
-
-.button-area, .canvas-area
-{
-  text-align: center;
-}
-
-.canvas-area
-{
-  width: 480px;
-  max-width: 100%;
-  position: relative;
-  padding: 0;
-  box-sizing: content-box;
-}
-
-.canvas-area:before
-{
-  content: "";
-  display: block;
-  padding-top: 100%;
-}
-
-.canvas-area > canvas
-{
-  position: absolute;
-  left: 0;
-  top: 0;
-  border: 1px solid;
-  max-width: 100%;
-  box-sizing: content-box;
-  padding: 0;
-  margin: 0;
-}
-
diff --git a/test.php b/test.php
deleted file mode 100644
index 973d918..0000000
--- a/test.php
+++ /dev/null
@@ -1,16 +0,0 @@
-<?php
-if(isset($_POST["save"])):
-    echo "<script>alert('保存しました')</script>";
-
-    $name = htmlspecialchars($_POST["name"], ENT_QUOTES); 
-    $address = htmlspecialchars($_POST["address"], ENT_QUOTES); 
-else:
-?>
-<form action="" method="post">
-    <input type="text" name="name" value="<?= $name;?>">
-    <input type="text" name="address" value="<?= $address;?>">
-    <input type="submit" name="save" value="保存">
-</form>
-<?php
-endif;
-?>
\ No newline at end of file