Turkey gravy

I didn't know how to make turkey gravy for Thanksgiving until 2 years ago. Here it is.

Arrowroot or corn starch
Cold water
Fat drippings from baked turkey

-When turkey juice is still hot from pan, mix in separate bowl 1/4 C arrowroot or corn starch, and 1/2 C cold water. Stir and smooth out.
-Pour into saucepan, then add turkey fat drippings.
-Bring to a boil and stir constantly until thick.
-If too thin, add arrowroot, if too thick add water.