diff --git a/2017-Overdeadline-ostrich2821.js b/2017-Overdeadline-ostrich2821.js
new file mode 100644
index 0000000..1478fa5
--- /dev/null
+++ b/2017-Overdeadline-ostrich2821.js
@@ -0,0 +1,21 @@
+function getBMI(height,weight){
+    var myBMI =  weight / (height * height);
+    
+    return myBMI;
+}
+
+getBMI(1.5, 50);
+
+var BMI = getBMI(1.5, 50);
+
+function getMessage(){
+    if ( BMI < 18.5 ){
+        console.log('體重過輕');
+    }else if(18.5 <= BMI && 24 > BMI){
+        console.log('正常範圍');
+    }else{
+        console.log('異常範圍');
+    }
+}
+
+getMessage();
\ No newline at end of file