diff --git a/2017-pey-yubin.js b/2017-pey-yubin.js
new file mode 100644
index 0000000..b17ebed
--- /dev/null
+++ b/2017-pey-yubin.js
@@ -0,0 +1,22 @@
+/* 2017 pey 許郁彬 */
+
+function getBMI(height, weight) {
+    return weight / (height / 100.0) ** 2
+}
+
+function getMessage(height, weight) {
+    var bmi = getBMI(height, weight);
+    if (bmi < 18.5)
+        return "體重過輕";
+    else if (bmi >= 18.5 && bmi < 24)
+        return "正常範圍";
+    else if (bmi >= 24 && bmi < 27)
+        return "過重";
+    else if (bmi >= 27 && bmi < 30)
+        return "輕度肥胖";
+    else if (bmi >= 30 && bmi < 35)
+        return "中度肥胖";
+    else
+        return "重度肥胖";
+}
+getMessage(177, 62);
\ No newline at end of file