There are no error messages.

I'm just lost, don't understand

```
Replace this line with your code.
// Write your function starting on line 3
var perimeterBox = function(perimeter) {
```

There are no error messages.

I'm just lost, don't understand

```
Replace this line with your code.
// Write your function starting on line 3
var perimeterBox = function(perimeter) {
```

HI the instruction says..

2 Write a function called **perimeterBox** that **returns the perimeter of a rectangle**.

1 It should have **two parameters**.

since it's a **rectangle** we will have a **length** and **width** as **argument** of your function

```
var perimeterBox = function(length, width) {
#do something
}
```

then they also aske to **return** inside that function the perimeter of a rectangle

```
return length + width + length + width;
or
return 2 * (length + width)
```

then you should call the function **perimeterBox()** with two number

HOpe that could help you..