Make cheddar cheese sauce

How to make cheddar cheese sauce? The reason I want a recipe is so I can make broccoli and cheddar

you have to boil milk, but continuously stir it until it starts to boil, then add in as much cheddar as you want, but don't stop stirring or else it will have this really weird texture when it's done, and it's not cute. stir stir stir!!!

***EDIT***
I'm sorry I forget one major part of this recipe! FLOUR! it thickens the sauce and doesn't make it chunky and gross. here's an exact recipe I got in a cooking class a while back:

* 3 tablespoons butter
* 3 tablespoons flour
* 1/2 teaspoon salt
* 1/8 teaspoon ground black or white pepper
* 1 1/2 cups milk
* 1 cup grated Cheddar

I know how to make brocolli chedder soup, but not really cheese sauce.
if it were me I would look up a recipe, but I hardly do that, I usually make it up as I go along.
I would start to boil some milk and start adding cubes of velveeta until it's at the thickness I want. lol. maybe add some salt and pepper or something to season it more.

Start by make a ruex[ sp] sauce, and then continue by adding ...[depending on how cheesy you want it] cheddar cheese by the cups.. goodluck!