Extend Constructors to Receive Arguments - Need Help Please

Tell us what’s happening:
Can’t seem to figure out how to use the cardinal function. Thanks

Your code so far

let cardinal  = new Dog() {
  cardinal.name = "Huskar"
  cardinal.color = "Brown"
  cardinal.numLegs = 4

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Link to the challenge:

You are not supposed to be using a cardinal function. You are supposed to be creating a Dog constructor. Below are the instructions:

Create another Dog constructor. This time, set it up to take the parameters name and color, and have the property numLegs fixed at 4. Then create a new Dog saved in a variable terrier. Pass it two strings as arguments for the name and color properties.