I am trying to write and execute a perimeterBox function for javascript Functions with 2 parameters lesson. I get an error msg telling me that my perimeterBox function doesnt return the correct perimeter.

Can someone help me out with this?

Thanks.

`var perimeterBox = function(length, length, width, width){

return length + length + width + width;

};

perimeterBox(1,1,1,1);

`